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2. Fracture Toughness, Radiation Hardness, and Processibility of Polymers for Superconducting Magnets

Author

Anders Gaarud, Christian Scheuerlein, David Mate Parragh, Sébastien Clement, Jacob Bertsch, Cedric Urscheler, Roland Piccin, Federico Ravotti, Giuseppe Pezzullo, and Ralf Lach

Subjects
epoxy resin, polyurethane, PMMA, PC, fracture toughness, superconducting magnet, Organic chemistry, QD241-441
Abstract

High fracture toughness at cryogenic temperature and radiation hardness can be conflicting requirements for the resins for the impregnation of superconducting magnet coils. The fracture toughness of different epoxy-resin systems at room temperature (RT) and at 77 K was measured, and their toughness was compared with that determined for a polyurethane, polycarbonate (PC) and poly(methyl methacrylate) (PMMA). Among the epoxy resins tested in this study, the MY750 system has the highest 77 K fracture toughness of KIC = 4.6 MPa√m, which is comparable to the KIC of PMMA, which also exhibits linear elastic behaviour and unstable crack propagation. The polyurethane system tested has a much higher 77 K toughness than the epoxy resins, approaching the toughness of PC, which is known as one of the toughest polymer materials. CTD101K is the least performing in terms of fracture toughness. Despite this, it is used for the impregnation of large Nb3Sn coils for its good processing capabilities and relatively high radiation resistance. In this study, the fracture toughness of CTD101K was improved by adding the polyglycol flexibiliser Araldite DY040 as a fourth component. The different epoxy-resin systems were exposed to proton and gamma doses up to 38 MGy, and it was found that adding the DY040 flexibiliser to the CTD101K system did not significantly change the irradiation-induced ageing behaviour. The viscosity evolution of the uncured resin mix is not significantly changed when adding the DY040 flexibiliser, and at the processing temperature of 60 °C, the viscosity remains below 200 cP for more than 24 h. Therefore, the new resin referred to as POLAB Mix is now used for the impregnation of superconducting magnet coils.

Published
2024
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3. Immunoglobulin, glucocorticoid, or combination therapy for multisystem inflammatory syndrome in children: a propensity-weighted cohort study

Author

Chouli, Mohamed, Hamadouche, Nacera, Ladj, Mohamed Samir, Agrimbau Vázquez, Jorge, Carmona, Rodrigo, Collia, Adrian Gustavo, Ellis, Alejandro, Natta, Diego, Pérez, Laura, Rubiños, Mayra, Veliz, Natalia, Yori, Silvana, Britton, Philip N., Burgner, David P., Carey, Emma, Crawford, Nigel W., Giuliano, Hayley, McMinn, Alissa, Wong, Shirley, Wood, Nicholas, Holter, Wolfgang, Krainz, Matthias, Ulreich, Raphael, Zurl, Christoph, Dehoorne, Joke, Haerynck, Filomeen, Hoste, Levi, Schelstraete, Petra, Vandekerckhove, Kristof, Willems, Jef, Almeida Farias, Camila Giuliana, Almeida, Flávia Jacqueline, Alves Leal, Izabel, Araujo da Silva, André Ricardo, Araujo e Silva, Anna Esther, Barreiro, Sabrina T.A., Bomfim Prado da Silva, Daniella Gregória, Cervi, Maria Celia, dos Santos Naja Cardoso, Mirian Viviane, Henriques Teixeira, Cristiane, Jarovsky, Daniel, Martins Araujo, Julienne, Naaman Berezin, Eitan, Palazzi Sáfadi, Marco Aurélio, Paternina-de la Ossa, Rolando Andres, Souza Vieira, Cristina, Dimitrova, Anna, Ganeva, Margarita, Stefanov, Stefan, Telcharova-Mihaylovska, Albena, Biggs, Catherine M., Lopez, Alison, Scuccimarri, Rosie, Tan, Ryan, Wasserman, Sam, Withington, Davinia, Ampuero, Camila, Aravena, Javiera, Bustos B, Raul, Casanova, Daniel, Cruces, Pablo, Diaz, Franco, García-Salum, Tamara, Godoy, Loreto, Medina, Rafael A., Valenzuela Galaz, Gonzalo, Camacho-Moreno, Germán, Avila-Aguero, María L., Brenes-Chacón, Helena, Camacho-Badilla, Kattia, Ivankovich-Escoto, Gabriela, Naranjo-Zuniga, Gabriela, Soriano-Fallas, Alejandra, Ulloa-Gutierrez, Rolando, Yock-Corrales, Adriana, Amer, Maysa Abbas, Abdelmeguid, Yasmine, Ahmed, Yomna H.H.Z., Badib, Adham, Badreldin, Karim, Elkhashab, Yara, Heshmat, Hassan, Hussein, Amna, Mohamed Hussein, Amna Hussein, Ibrahim, Sandra, Shoman, Walaa, Yakout, Radwa M, Heinonen, Santtu, Angoulvant, François, Belot, Alexandre, Ouldali, Naïm, Beske, Florian, Heep, Axel, Masjosthusmann, Katja, Reiter, Karl, van den Heuvel, Ingeborg, von Both, Ulrich, Agrafiotou, Aikaterini, Antachopoulos, Charalampos, Charisi, Konstantina, Eleftheriou, Irini, Farmaki, Evangelia, Fotis, Lampros, Kafetzis, Dimitrios, Koletsi, Patra, Kourtesi, Katerina, Lampidi, Stavroula, Liakopoulou, Theodota, Maritsi, Despoina, Michailidou, Elisa, Milioudi, Maria, Mparmpounaki, Ioanna, Papadimitriou, Eleni, Papaevangelou, Vassiliki, Roilides, Emmanuel, Tsiatsiou, Olga, Tsolas, Georgios, Tsolia, Maria, Vantsi, Petrina, Banegas Pineda, Linda Yajeira, Borjas Aguilar, Karla Leversia, Cantillano Quintero, Edwin Mauricio, Ip, Patrick, Kwan, Mike Yat Wah, Kwok, Janette, Lau, Yu Lung, To, Kelvin, Wong, Joshua Sung Chih, David, Mate, Farkas, David, Kalcakosz, Szofia, Szekeres, Klaudia, Zsigmond, Borbala, Aslam, Nadeem, Luder, Anthony, Andreozzi, Laura, Bianco, Francesco, Bucciarelli, Valentina, Buonsenso, Danilo, Cimaz, Rolando, De Luca, Maia, Dellepiane, Rosa Maria, Fabi, Marianna, Filice, Emanuele, Lanari, Marcello, Lo Vecchio, Andrea, Mastrolia, Maria Vincenza, Mauro, Angela, Mazza, Angelo, Papa, Mario Virgilio, Romani, Lorenza, Scarano, Sara Maria, Simonini, Gabriele, Tipo, Vincenzo, Verdoni, Lucio, Macharia, Anne-Marie, Musiime, Grace, Reel, Bhupi, Wangai, Frederick, Pace, David, Torpiano, Paul, Anaya-Enriquez, Nancy, Carreon-Guerrero, Juan Manuel, Chacon-Cruz, Enrique, Cheung López, Mariana, Faugier Fuentes, Enrique, Fonseca Flores, Marisol, García-Domínguez, Miguel, Giron Vargas, Ana Luisa, Lopez-Delgado, Ivan, Lopez Hernández, Liliana, Menchaca Aguayo, Hector F., Montaño-Duron, Jesus Gilberto, Pérez-Gaxiola, Giordano, Ramos Tiñini, Pamela, Tostado-Morales, Edgardo, Valadez, Julio, Inchley, Christopher, Klevberg, Sjur, Knudsen, Per Kristian, Måseide, Per Helge, Carrera, Jose Manuel, Castaño, Elizabeth, Daza Timana, Carlos Alberto, De Leon, Tirza, Estripeaut, Dora, Levy, Jacqueline, Norero, Ximena, Record, Javier, Rojas-Bonilla, Magda, Wong, Mayra, Iramain, Ricardo, Hernandez, Roger, Huamán, Gian, Munaico, Manuel, Peralta, Carlos, Seminario, Diego, Zapata Yarlequé, Elmer Hans, Gadzinska, Justyna, Ludwikowska, Kamila, Mandziuk, Joanna, Okarska-Napierała, Magdalena, Alacheva, Zalina A., Alexeeva, Ekaterina, Ananin, Petr V., Antsupova, Margarita, Bakradze, Maya D., Berbenyuk, Anna, Bobkova, Polina, Borzakova, Svetlana, Chashchina, Irina L., El-Taravi, Yasmin, Fisenko, Andrey P., Gautier, Marina S., Glazyrina, Anastasia, Gorlenko, Cyrill, Grosheva, Mariia, Kiselev, Herman, Kondrikova, Elena, Korobyants, Evgeniya, Korsunskiy, Anatoliy A., Kovygina, Karina, Krasnaya, Ekaterina, Kurbanova, Seda, Kurdup, Maria K., Mamutova, Anna V., Mazankova, Lyudmila, Mitushin, Ilya L., Munblit, Daniel, Nargizyan, Anzhelika, Orlova, Yanina O., Osmanov, Ismail M., Polyakova, Anastasia S., Pushkareva, Anna, Romanova, Olga, Samitova, Elmira, Shvedova, Anastasia, Sologub, Anna, Iakovleva, Ekaterina, Tepaev, Rustem F., Tkacheva, Anna A., Yegiyan, Margarita, Yusupova, Valeriya, Zholobova, Elena, Grasa, Carlos Daniel, Epalza, Cristina, Lopez Segura, Nuria, Martinon-Torres, Federico, Melendo, Susana, Mendez-Echevarria, Ana, Mesa Guzmán, Juan Miguel, Palacios Argueta, Jorge Roberto, Rivero-Calle, Irene, Rivière, Jacques, Rodríguez-González, Moisés, Rojo, Pablo, Sanchez Manubens, Judith, Soler-Palacin, Pere, Soriano-Arandes, Antoni, Tagarro, Alfredo, Villaverde, Serena, Altman, Maria, Brodin, Petter, Horne, AnnaCarin, Palmblad, Karin, Brotschi, Barbara, Meyer Sauteur, Patrick, Pachlopnik Schmid, Jana, Prader, Seraina, Relly, Christa, Schlapbach, Luregn J., Seiler, Michelle, Strasser, Sophie, Trück, Johannes, Weber, Kathrin, Wütz, Daniela, Hamdan, Alaa, Melhem, Ibrahim, Moussa, Ahmed, Dunk, Joke, Ketharanathan, Naomi, Vermont, Clementien, Akyüz Özkan, Esra, Cetin, Benhur Sirvan, Erdeniz, Emine Hafize, Şahin, Irfan Oğuz, Borisova, Galina, Boyarchuk, Oksana, Boychenko, Lidiya, Boyko, Yaryna, Diudenko, Nadiia, Dyvonyak, Olha, Kasiyan, Olexandr, Katerynych, Kostiantyn, Kostyuchenko, Larysa, Mamenko, Marina, Melnyk, Kateryna, Miagka, Nelia, Nazarenko, Liliya, Nezgoda, Iryna, Rykova, Stanislava, Svyst, Olga, Teslenko, Maria, Trykosh, Mykola, Vasilenko, Nataliya, Volokha, Alla, Adams, Charlotte, Akomolafe, Toju, Al-Abadi, Eslam, Alders, Nele, Alifieraki, Styliani, Ansumanu, Hareef, Aston, Emily, Avram, Paula, Bamford, Alasdair, Banks, Millie, Basu Roy, Robin, Beattie, Thomas, Boleti, Olga, Bracken, Abbey, Broad, Jonathan, Cai, James, Carrol, Enitan D., Carter, Michael, Chandran, Anchit, Charlesworth, James, Chawla, Jaya, Cooper, Hannah, Cooray, Samantha, Davies, Patrick, Davis, Francesca, Drysdale, Simon B., Dzora, Ella, Emonts, Marieke, Evans, Ceri, Fidler, Katy, Foster, Caroline, Gong, Chen, Gongrun, Berin, Gonzalez, Carmen, Gorgun, Berin, Grandjean, Louis, Grant, Karlie, Guo, Jonathan, Hacohen, Yael, Hall, Jack, Hamid, Hytham K.S., Hassell, Jane, Hesketh, Christine, Hewlett, Jessica, Hnieno, Ahmad, Holt-Davis, Hannah, Hossain, Aleena, Hu, Shiying, Hudson, Lee D., Jheeta, Sharon, Johnson, Mae, Johnson, Sarah, Jyothish, Deepthi, Kampmann, Beate, Kavirayani, Akhila, Kelly, Deborah, Kirubakaran, Arangan, Kucera, Filip, Langer, Daniel, Lawson, George, Lees, Emily A, Lenihan, Rebecca, Lillie, Jon, Longbottom, Katherine, Lyall, Hermione, Mackdermott, Niamh, Maltby, Sarah, Mclelland, Thomas, McMahon, Anne-Marie, Miller, Danielle, Miranda, Mariana, Mirza, Luwaiza, Morrison, Zoe, Moshal, Karyn, Muller, Jennifer, Musuka, Phoebe, Myttaraki, Evangelia, Nadel, Simon, Nair, Sreedevi, Nuttall, Luke, Oremakinde, Oyinkansola, Osaghae, Daniella, Osman, Fatima, Ostrzewska, Anna, Paccagnella, Davide, Panthula, Mrinalini, Papachatzi, Eleni, Papadopoulou, Charalampia, Patel, Fahim, Patel, Harsita, Payne, Helen, Penner, Justin, Polandi, Shervin, Prendergast, Andrew J., Ramnarayan, Padmanabhan, Ranasinghe, Lasith, Ravichandran, Muthukumaran, Rhys-Evans, Sophie, Riordan, Andrew, Rodrigues, Charlene M.C., Roe, Lauren, Romaine, Sam, Schobi, Nina, Seddon, James, Shingadia, Delane, Sikdar, Oishi, Srivastava, Anand, Struik, Siske, Sun, Thomas, Tan, Rachel Wei, Taylor, Alice, Taylor, Amanda, Taylor, Andrew, Tran, Steven, Tsagkaris, Stavros, Tudor-Williams, Gareth, van den Berg, Sarah, van der Velden, Fabian, Ventilacion, Lyn, Wellman, Paul A., Withers Green, Joseph, Yanney, Michael P., Yeung, Shunmay, Badheka, Aditya, Badran, Sarah, Bailey, Dwight M., Burch, Anna Kathryn, Burns, Jane C., Cichon, Catherine, Cirks, Blake, Dallman, Michael D., Delany, Dennis R., Fairchok, Mary, Friedman, Samantha, Geracht, Jennifer, Langs-Barlow, Allison, Mann, Kelly, Padhye, Amruta, Quade, Alexis, Ramirez, Kacy Alyne, Rockett, John, Sayed, Imran Ali, Santos, Roberto P., Shahin, Amr A., Tremoulet, Adriana, Umaru, Samuel, Widener, Rebecca, Mujuru, Hilda Angela, Kandawasvika, Gwendoline, Channon-Wells, Samuel, Vito, Ortensia, McArdle, Andrew J, Seaby, Eleanor G, Shah, Priyen, Pazukhina, Ekaterina, Wilson, Clare, Broderick, Claire, D'Souza, Giselle, Keren, Ilana, Nijman, Ruud G, Carter, Michael J, De, Tisham, Hoggart, Clive, Whittaker, Elizabeth, Herberg, Jethro A, Kaforou, Myrsini, Cunnington, Aubrey J, Blyuss, Oleg, and Levin, Michael

Published
2023
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4. Effect of Irradiation Temperature and Atmosphere on Aging of Epoxy Resins for Superconducting Magnets

Author

David Mate Parragh, Christian Scheuerlein, Noémie Martin, Roland Piccin, Federico Ravotti, Giuseppe Pezzullo, Torsten Koettig, and Dirk Lellinger

Subjects
accelerator magnets, FCC, HL-LHC, epoxy resin, irradiation, DMA, Organic chemistry, QD241-441
Abstract

The superconducting magnets of future particle accelerators will be exposed to high irradiation doses at cryogenic temperatures. To investigate the effect of irradiation temperature and atmosphere on the aging behavior, we have characterized the changes in thermomechanical properties of six epoxy resins for potential use in superconducting magnets after irradiation up to 20 MGy in ambient air, inert gas, and liquid helium. Based on the results obtained by Dynamic Mechanical Analysis (DMA), we discuss the effect of irradiation temperature and the presence of oxygen. The irradiation temperature can have a strong influence on the rates at which cross-linking and chain scission occur.

Published
2024
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6. Fracture Toughness, Radiation Hardness, and Processibility of Polymers for Superconducting Magnets.

Author

Gaarud, Anders, Scheuerlein, Christian, Parragh, David Mate, Clement, Sébastien, Bertsch, Jacob, Urscheler, Cedric, Piccin, Roland, Ravotti, Federico, Pezzullo, Giuseppe, and Lach, Ralf

Subjects
FRACTURE toughness, SUPERCONDUCTING coils, HARDNESS, EPOXY resins, RADIATION, METHYL methacrylate, SUPERCONDUCTING magnets, MAGNETS
Abstract

High fracture toughness at cryogenic temperature and radiation hardness can be conflicting requirements for the resins for the impregnation of superconducting magnet coils. The fracture toughness of different epoxy-resin systems at room temperature (RT) and at 77 K was measured, and their toughness was compared with that determined for a polyurethane, polycarbonate (PC) and poly(methyl methacrylate) (PMMA). Among the epoxy resins tested in this study, the MY750 system has the highest 77 K fracture toughness of KIC = 4.6 MPa√m, which is comparable to the KIC of PMMA, which also exhibits linear elastic behaviour and unstable crack propagation. The polyurethane system tested has a much higher 77 K toughness than the epoxy resins, approaching the toughness of PC, which is known as one of the toughest polymer materials. CTD101K is the least performing in terms of fracture toughness. Despite this, it is used for the impregnation of large Nb3Sn coils for its good processing capabilities and relatively high radiation resistance. In this study, the fracture toughness of CTD101K was improved by adding the polyglycol flexibiliser Araldite DY040 as a fourth component. The different epoxy-resin systems were exposed to proton and gamma doses up to 38 MGy, and it was found that adding the DY040 flexibiliser to the CTD101K system did not significantly change the irradiation-induced ageing behaviour. The viscosity evolution of the uncured resin mix is not significantly changed when adding the DY040 flexibiliser, and at the processing temperature of 60 °C, the viscosity remains below 200 cP for more than 24 h. Therefore, the new resin referred to as POLAB Mix is now used for the impregnation of superconducting magnet coils. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Immunoglobulin, glucocorticoid, or combination therapy for multisystem inflammatory syndrome in children: a propensity-weighted cohort study

Author

Channon-Wells, Samuel, primary, Vito, Ortensia, additional, McArdle, Andrew J, additional, Seaby, Eleanor G, additional, Patel, Harsita, additional, Shah, Priyen, additional, Pazukhina, Ekaterina, additional, Wilson, Clare, additional, Broderick, Claire, additional, D'Souza, Giselle, additional, Keren, Ilana, additional, Nijman, Ruud G, additional, Tremoulet, Adriana, additional, Munblit, Daniel, additional, Ulloa-Gutierrez, Rolando, additional, Carter, Michael J, additional, Ramnarayan, Padmanabhan, additional, De, Tisham, additional, Hoggart, Clive, additional, Whittaker, Elizabeth, additional, Herberg, Jethro A, additional, Kaforou, Myrsini, additional, Cunnington, Aubrey J, additional, Blyuss, Oleg, additional, Levin, Michael, additional, Chouli, Mohamed, additional, Hamadouche, Nacera, additional, Ladj, Mohamed Samir, additional, Agrimbau Vázquez, Jorge, additional, Carmona, Rodrigo, additional, Collia, Adrian Gustavo, additional, Ellis, Alejandro, additional, Natta, Diego, additional, Pérez, Laura, additional, Rubiños, Mayra, additional, Veliz, Natalia, additional, Yori, Silvana, additional, Britton, Philip N., additional, Burgner, David P., additional, Carey, Emma, additional, Crawford, Nigel W., additional, Giuliano, Hayley, additional, McMinn, Alissa, additional, Wong, Shirley, additional, Wood, Nicholas, additional, Holter, Wolfgang, additional, Krainz, Matthias, additional, Ulreich, Raphael, additional, Zurl, Christoph, additional, Dehoorne, Joke, additional, Haerynck, Filomeen, additional, Hoste, Levi, additional, Schelstraete, Petra, additional, Vandekerckhove, Kristof, additional, Willems, Jef, additional, Almeida Farias, Camila Giuliana, additional, Almeida, Flávia Jacqueline, additional, Alves Leal, Izabel, additional, Araujo da Silva, André Ricardo, additional, Araujo e Silva, Anna Esther, additional, Barreiro, Sabrina T.A., additional, Bomfim Prado da Silva, Daniella Gregória, additional, Cervi, Maria Celia, additional, dos Santos Naja Cardoso, Mirian Viviane, additional, Henriques Teixeira, Cristiane, additional, Jarovsky, Daniel, additional, Martins Araujo, Julienne, additional, Naaman Berezin, Eitan, additional, Palazzi Sáfadi, Marco Aurélio, additional, Paternina-de la Ossa, Rolando Andres, additional, Souza Vieira, Cristina, additional, Dimitrova, Anna, additional, Ganeva, Margarita, additional, Stefanov, Stefan, additional, Telcharova-Mihaylovska, Albena, additional, Biggs, Catherine M., additional, Lopez, Alison, additional, Scuccimarri, Rosie, additional, Tan, Ryan, additional, Wasserman, Sam, additional, Withington, Davinia, additional, Ampuero, Camila, additional, Aravena, Javiera, additional, Bustos B, Raul, additional, Casanova, Daniel, additional, Cruces, Pablo, additional, Diaz, Franco, additional, García-Salum, Tamara, additional, Godoy, Loreto, additional, Medina, Rafael A., additional, Valenzuela Galaz, Gonzalo, additional, Camacho-Moreno, Germán, additional, Avila-Aguero, María L., additional, Brenes-Chacón, Helena, additional, Camacho-Badilla, Kattia, additional, Ivankovich-Escoto, Gabriela, additional, Naranjo-Zuniga, Gabriela, additional, Soriano-Fallas, Alejandra, additional, Yock-Corrales, Adriana, additional, Amer, Maysa Abbas, additional, Abdelmeguid, Yasmine, additional, Ahmed, Yomna H.H.Z., additional, Badib, Adham, additional, Badreldin, Karim, additional, Elkhashab, Yara, additional, Heshmat, Hassan, additional, Hussein, Amna, additional, Mohamed Hussein, Amna Hussein, additional, Ibrahim, Sandra, additional, Shoman, Walaa, additional, Yakout, Radwa M, additional, Heinonen, Santtu, additional, Angoulvant, François, additional, Belot, Alexandre, additional, Ouldali, Naïm, additional, Beske, Florian, additional, Heep, Axel, additional, Masjosthusmann, Katja, additional, Reiter, Karl, additional, van den Heuvel, Ingeborg, additional, von Both, Ulrich, additional, Agrafiotou, Aikaterini, additional, Antachopoulos, Charalampos, additional, Charisi, Konstantina, additional, Eleftheriou, Irini, additional, Farmaki, Evangelia, additional, Fotis, Lampros, additional, Kafetzis, Dimitrios, additional, Koletsi, Patra, additional, Kourtesi, Katerina, additional, Lampidi, Stavroula, additional, Liakopoulou, Theodota, additional, Maritsi, Despoina, additional, Michailidou, Elisa, additional, Milioudi, Maria, additional, Mparmpounaki, Ioanna, additional, Papadimitriou, Eleni, additional, Papaevangelou, Vassiliki, additional, Roilides, Emmanuel, additional, Tsiatsiou, Olga, additional, Tsolas, Georgios, additional, Tsolia, Maria, additional, Vantsi, Petrina, additional, Banegas Pineda, Linda Yajeira, additional, Borjas Aguilar, Karla Leversia, additional, Cantillano Quintero, Edwin Mauricio, additional, Ip, Patrick, additional, Kwan, Mike Yat Wah, additional, Kwok, Janette, additional, Lau, Yu Lung, additional, To, Kelvin, additional, Wong, Joshua Sung Chih, additional, David, Mate, additional, Farkas, David, additional, Kalcakosz, Szofia, additional, Szekeres, Klaudia, additional, Zsigmond, Borbala, additional, Aslam, Nadeem, additional, Luder, Anthony, additional, Andreozzi, Laura, additional, Bianco, Francesco, additional, Bucciarelli, Valentina, additional, Buonsenso, Danilo, additional, Cimaz, Rolando, additional, De Luca, Maia, additional, Dellepiane, Rosa Maria, additional, Fabi, Marianna, additional, Filice, Emanuele, additional, Lanari, Marcello, additional, Lo Vecchio, Andrea, additional, Mastrolia, Maria Vincenza, additional, Mauro, Angela, additional, Mazza, Angelo, additional, Papa, Mario Virgilio, additional, Romani, Lorenza, additional, Scarano, Sara Maria, additional, Simonini, Gabriele, additional, Tipo, Vincenzo, additional, Verdoni, Lucio, additional, Macharia, Anne-Marie, additional, Musiime, Grace, additional, Reel, Bhupi, additional, Wangai, Frederick, additional, Pace, David, additional, Torpiano, Paul, additional, Anaya-Enriquez, Nancy, additional, Carreon-Guerrero, Juan Manuel, additional, Chacon-Cruz, Enrique, additional, Cheung López, Mariana, additional, Faugier Fuentes, Enrique, additional, Fonseca Flores, Marisol, additional, García-Domínguez, Miguel, additional, Giron Vargas, Ana Luisa, additional, Lopez-Delgado, Ivan, additional, Lopez Hernández, Liliana, additional, Menchaca Aguayo, Hector F., additional, Montaño-Duron, Jesus Gilberto, additional, Pérez-Gaxiola, Giordano, additional, Ramos Tiñini, Pamela, additional, Tostado-Morales, Edgardo, additional, Valadez, Julio, additional, Inchley, Christopher, additional, Klevberg, Sjur, additional, Knudsen, Per Kristian, additional, Måseide, Per Helge, additional, Carrera, Jose Manuel, additional, Castaño, Elizabeth, additional, Daza Timana, Carlos Alberto, additional, De Leon, Tirza, additional, Estripeaut, Dora, additional, Levy, Jacqueline, additional, Norero, Ximena, additional, Record, Javier, additional, Rojas-Bonilla, Magda, additional, Wong, Mayra, additional, Iramain, Ricardo, additional, Hernandez, Roger, additional, Huamán, Gian, additional, Munaico, Manuel, additional, Peralta, Carlos, additional, Seminario, Diego, additional, Zapata Yarlequé, Elmer Hans, additional, Gadzinska, Justyna, additional, Ludwikowska, Kamila, additional, Mandziuk, Joanna, additional, Okarska-Napierała, Magdalena, additional, Alacheva, Zalina A., additional, Alexeeva, Ekaterina, additional, Ananin, Petr V., additional, Antsupova, Margarita, additional, Bakradze, Maya D., additional, Berbenyuk, Anna, additional, Bobkova, Polina, additional, Borzakova, Svetlana, additional, Chashchina, Irina L., additional, El-Taravi, Yasmin, additional, Fisenko, Andrey P., additional, Gautier, Marina S., additional, Glazyrina, Anastasia, additional, Gorlenko, Cyrill, additional, Grosheva, Mariia, additional, Kiselev, Herman, additional, Kondrikova, Elena, additional, Korobyants, Evgeniya, additional, Korsunskiy, Anatoliy A., additional, Kovygina, Karina, additional, Krasnaya, Ekaterina, additional, Kurbanova, Seda, additional, Kurdup, Maria K., additional, Mamutova, Anna V., additional, Mazankova, Lyudmila, additional, Mitushin, Ilya L., additional, Nargizyan, Anzhelika, additional, Orlova, Yanina O., additional, Osmanov, Ismail M., additional, Polyakova, Anastasia S., additional, Pushkareva, Anna, additional, Romanova, Olga, additional, Samitova, Elmira, additional, Shvedova, Anastasia, additional, Sologub, Anna, additional, Iakovleva, Ekaterina, additional, Tepaev, Rustem F., additional, Tkacheva, Anna A., additional, Yegiyan, Margarita, additional, Yusupova, Valeriya, additional, Zholobova, Elena, additional, Grasa, Carlos Daniel, additional, Epalza, Cristina, additional, Lopez Segura, Nuria, additional, Martinon-Torres, Federico, additional, Melendo, Susana, additional, Mendez-Echevarria, Ana, additional, Mesa Guzmán, Juan Miguel, additional, Palacios Argueta, Jorge Roberto, additional, Rivero-Calle, Irene, additional, Rivière, Jacques, additional, Rodríguez-González, Moisés, additional, Rojo, Pablo, additional, Sanchez Manubens, Judith, additional, Soler-Palacin, Pere, additional, Soriano-Arandes, Antoni, additional, Tagarro, Alfredo, additional, Villaverde, Serena, additional, Altman, Maria, additional, Brodin, Petter, additional, Horne, AnnaCarin, additional, Palmblad, Karin, additional, Brotschi, Barbara, additional, Meyer Sauteur, Patrick, additional, Pachlopnik Schmid, Jana, additional, Prader, Seraina, additional, Relly, Christa, additional, Schlapbach, Luregn J., additional, Seiler, Michelle, additional, Strasser, Sophie, additional, Trück, Johannes, additional, Weber, Kathrin, additional, Wütz, Daniela, additional, Hamdan, Alaa, additional, Melhem, Ibrahim, additional, Moussa, Ahmed, additional, Dunk, Joke, additional, Ketharanathan, Naomi, additional, Vermont, Clementien, additional, Akyüz Özkan, Esra, additional, Cetin, Benhur Sirvan, additional, Erdeniz, Emine Hafize, additional, Şahin, Irfan Oğuz, additional, Borisova, Galina, additional, Boyarchuk, Oksana, additional, Boychenko, Lidiya, additional, Boyko, Yaryna, additional, Diudenko, Nadiia, additional, Dyvonyak, Olha, additional, Kasiyan, Olexandr, additional, Katerynych, Kostiantyn, additional, Kostyuchenko, Larysa, additional, Mamenko, Marina, additional, Melnyk, Kateryna, additional, Miagka, Nelia, additional, Nazarenko, Liliya, additional, Nezgoda, Iryna, additional, Rykova, Stanislava, additional, Svyst, Olga, additional, Teslenko, Maria, additional, Trykosh, Mykola, additional, Vasilenko, Nataliya, additional, Volokha, Alla, additional, Adams, Charlotte, additional, Akomolafe, Toju, additional, Al-Abadi, Eslam, additional, Alders, Nele, additional, Alifieraki, Styliani, additional, Ansumanu, Hareef, additional, Aston, Emily, additional, Avram, Paula, additional, Bamford, Alasdair, additional, Banks, Millie, additional, Basu Roy, Robin, additional, Beattie, Thomas, additional, Boleti, Olga, additional, Bracken, Abbey, additional, Broad, Jonathan, additional, Cai, James, additional, Carrol, Enitan D., additional, Carter, Michael, additional, Chandran, Anchit, additional, Charlesworth, James, additional, Chawla, Jaya, additional, Cooper, Hannah, additional, Cooray, Samantha, additional, Davies, Patrick, additional, Davis, Francesca, additional, Drysdale, Simon B., additional, Dzora, Ella, additional, Emonts, Marieke, additional, Evans, Ceri, additional, Fidler, Katy, additional, Foster, Caroline, additional, Gong, Chen, additional, Gongrun, Berin, additional, Gonzalez, Carmen, additional, Gorgun, Berin, additional, Grandjean, Louis, additional, Grant, Karlie, additional, Guo, Jonathan, additional, Hacohen, Yael, additional, Hall, Jack, additional, Hamid, Hytham K.S., additional, Hassell, Jane, additional, Hesketh, Christine, additional, Hewlett, Jessica, additional, Hnieno, Ahmad, additional, Holt-Davis, Hannah, additional, Hossain, Aleena, additional, Hu, Shiying, additional, Hudson, Lee D., additional, Jheeta, Sharon, additional, Johnson, Mae, additional, Johnson, Sarah, additional, Jyothish, Deepthi, additional, Kampmann, Beate, additional, Kavirayani, Akhila, additional, Kelly, Deborah, additional, Kirubakaran, Arangan, additional, Kucera, Filip, additional, Langer, Daniel, additional, Lawson, George, additional, Lees, Emily A, additional, Lenihan, Rebecca, additional, Lillie, Jon, additional, Longbottom, Katherine, additional, Lyall, Hermione, additional, Mackdermott, Niamh, additional, Maltby, Sarah, additional, Mclelland, Thomas, additional, McMahon, Anne-Marie, additional, Miller, Danielle, additional, Miranda, Mariana, additional, Mirza, Luwaiza, additional, Morrison, Zoe, additional, Moshal, Karyn, additional, Muller, Jennifer, additional, Musuka, Phoebe, additional, Myttaraki, Evangelia, additional, Nadel, Simon, additional, Nair, Sreedevi, additional, Nuttall, Luke, additional, Oremakinde, Oyinkansola, additional, Osaghae, Daniella, additional, Osman, Fatima, additional, Ostrzewska, Anna, additional, Paccagnella, Davide, additional, Panthula, Mrinalini, additional, Papachatzi, Eleni, additional, Papadopoulou, Charalampia, additional, Patel, Fahim, additional, Payne, Helen, additional, Penner, Justin, additional, Polandi, Shervin, additional, Prendergast, Andrew J., additional, Ranasinghe, Lasith, additional, Ravichandran, Muthukumaran, additional, Rhys-Evans, Sophie, additional, Riordan, Andrew, additional, Rodrigues, Charlene M.C., additional, Roe, Lauren, additional, Romaine, Sam, additional, Schobi, Nina, additional, Seddon, James, additional, Shingadia, Delane, additional, Sikdar, Oishi, additional, Srivastava, Anand, additional, Struik, Siske, additional, Sun, Thomas, additional, Tan, Rachel Wei, additional, Taylor, Alice, additional, Taylor, Amanda, additional, Taylor, Andrew, additional, Tran, Steven, additional, Tsagkaris, Stavros, additional, Tudor-Williams, Gareth, additional, van den Berg, Sarah, additional, van der Velden, Fabian, additional, Ventilacion, Lyn, additional, Wellman, Paul A., additional, Withers Green, Joseph, additional, Yanney, Michael P., additional, Yeung, Shunmay, additional, Badheka, Aditya, additional, Badran, Sarah, additional, Bailey, Dwight M., additional, Burch, Anna Kathryn, additional, Burns, Jane C., additional, Cichon, Catherine, additional, Cirks, Blake, additional, Dallman, Michael D., additional, Delany, Dennis R., additional, Fairchok, Mary, additional, Friedman, Samantha, additional, Geracht, Jennifer, additional, Langs-Barlow, Allison, additional, Mann, Kelly, additional, Padhye, Amruta, additional, Quade, Alexis, additional, Ramirez, Kacy Alyne, additional, Rockett, John, additional, Sayed, Imran Ali, additional, Santos, Roberto P., additional, Shahin, Amr A., additional, Umaru, Samuel, additional, Widener, Rebecca, additional, Mujuru, Hilda Angela, additional, and Kandawasvika, Gwendoline, additional

Published
2023
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8. Uncovering the potential for geoscience research in Canada's North

Author

David Mate

Abstract

Uncovering the potential for geoscience research in Canada's North David Mate, Executive Director of the Northern Canada Division, Geological Survey of Canada, shares how the GEM-GeoNorth program is using geoscience research to improve the quality of life for Canadians. We have a longstanding geological knowledge gap in Canada. The north – the area above 57° latitude – encompasses roughly 40 per cent of the total area of Canada. Despite the importance of this region to the culture, history and identity of our country and its people, it has historically been understudied compared to southern Canada. We have much to understand about geoscience research in this environment, and resource potential, as well as the resilience of the land and infrastructure to climate change.

Published
2023

9. KF Postdeposition Treatment in N2 of Single-Stage Thin Cu(In,Ga)Se2 Absorber Layers

Author

Jef Poortmans, Marc Meuris, Jessica de Wild, David Mate Parragh, Bart Vermang, Dilara Gokcen Buldu, Gizem Birant, Guy Brammertz, and Thierry Kohl

Subjects
single-stage process, Technology, EFFICIENCY, Materials science, Energy & Fuels, Passivation, Annealing (metallurgy), Materials Science, Analytical chemistry, Materials Science, Multidisciplinary, 02 engineering and technology, Cu(In,Ga)Se-2 (CIGS), 7. Clean energy, 01 natural sciences, Temperature measurement, Physics, Applied, Alkali treatment, FILM SOLAR-CELLS, 0103 physical sciences, Electrical and Electronic Engineering, 010302 applied physics, Science & Technology, Single stage, Physics, Doping, 021001 nanoscience & nanotechnology, Condensed Matter Physics, thin absorber, Electronic, Optical and Magnetic Materials, Physical Sciences, 0210 nano-technology
Abstract

Thin (640 mV were achieved after the KF treatment. From SCAPS simulations and temperature dependent current voltage-measurements, it is concluded that the V-oc of these cells are limited by backcontact surface recombination and, thus, further improvements require passivation of the back contact. This work was supported by the European Union’s H2020 Research and Innovation Program under Grant 715027.

Published
2020

10. Hydrogen Embrittlement of TiZrV Non-Evaporable Getter Coating

Author

Parragh, David Mate

Subjects
Engineering, Accelerators and Storage Rings
Abstract

The study presented in this thesis work was performed to gain better understanding on the hydrogen saturation behavior of the TiZrV NEG coating, as well as on the effects of hydrogen sorption on the functionality of the coating. H$_2$ saturation experiments were conducted on two TiZrV coated stainless steel pipes subjected to two experimental conditions: instantaneous injections of H$_2$ at $1~$mbar injection pressure throughout 6 cycles, and continuous injection of H$_2$ at 5×$10^{-7}~$mbar to simulate saturation behavior at conditions similar to that of the H$_2$ injections part of the fixed target experiments at the LHCb experiment. The results demonstrated that at the injected hydrogen quantities, the sticking coefficient and the H$_2$ sorption rate of the TiZrV coating show a clear dependence on the absorbed hydrogen content, both decreasing at increased hydrogen absorption. The H$_2$ sorption limit was established as at minimum 0.407 H/TiZrV mol/mol at the 1 mbar injection condition and as 0.026 H/TiZrV mol/mol at the 5×$10^{-7}~$mbar continuous injection condition. Visual signs of embrittlement were not observed on the coating in the stainless steel pipes, proving the TiZrV alloy robust against hydrogen embrittlement. While embrittlement was not observed on the coating on the stainless steel pipes, the residual hydrogen content was observed to impose a limit on the H$_2$ sticking coefficient of the coating, highlighting the importance of ensuring sufficiently high hydrogen release kinetics and hydrogen removal rate during the reactivation. Besides, by characterization of witness samples from the $1~$mbar injection experimental condition it was determined that the repeated cycles of activation, H$_2$ injection, and venting decrease the efficiency of activation, motivating further investigation on the effect of hydrogen sorption on the activatability and the SEY of the NEG coating.

Published
2022

12. KF Postdeposition Treatment in N2 of Single-Stage Thin Cu(In,Ga)Se2 Absorber Layers

Author

Jessica de Wild, Thierry Kohl, Dilara G. Buldu, Gizem Birant, David Mate Parragh, Guy Brammertz, Marc Meuris, Jef Poortmans, Bart Vermang

Subjects
Alkali treatment, Cu(In,Ga)Se2 (CIGS), singlestage process, thin absorber
Abstract

Thin ( 640 mV were achieved after the KF treatment. From SCAPS simulations and temperature dependent current voltage measurements, it is concluded that the Voc of these cells are limited by back contact surface recombination and, thus, further improvements require passivation of the back contact.

Published
2019

13. Room temperature photoluminescence analysis of alkali treated single-stage thin Cu(In,Ga)Se2 absorber layers

Author

Gizem Birant, Jef Poortmans, Bart Vermang, Jessica de Wild, David Mate Parragh, Dilara Gokcen Buldu, Marc Meuris, Guy Brammertz, and Thierry Kohl

Subjects
010302 applied physics, Yield (engineering), Photoluminescence, Materials science, room temperature photoluminescence, Single stage, Band gap, Analytical chemistry, Cu(In,Ga)Se-2, 02 engineering and technology, 021001 nanoscience & nanotechnology, Alkali metal, 01 natural sciences, single-stage, Low energy, Planar, alkali treatment, 0103 physical sciences, 0210 nano-technology, Intensity (heat transfer)
Abstract

Room temperature photoluminescence (PL) and intensity dependent PL measurements were used as a tool to investigate alkali treatment (KF and RbF) of thin (< 500 nm) single-stage absorber layers and compared with similar 3-stage samples. Single-stage absorber layers have a clear distinguishable PL peak below the band gap, which is absent in 3-stage absorber layers. We attribute this peak to a defect band arising due to the planar defects and the small grains. We find that this low energy peak can be largely reduced with alkali treatment, leading to similar decay times and PL yield as thin 3 stage samples. This work received funding from the European Union’s H2020 research and innovation program under grant agreement No. 715027

Published
2019

15. KF Postdeposition Treatment in N2 of Single-Stage Thin Cu(In,Ga)Se2 Absorber Layers

Author

de Wild, Jessica, Kohl, Thierry, Buldu, Dilara G., Birant, Gizem, Parragh, David Mate, Brammertz, Guy, Meuris, Marc, Poortmans, Jef, and Vermang, Bart

Abstract

Thin (&lt;;500 nm) single-stage coevaporated Cu(In, Ga)Se2 absorber layers are treated with a KF postanneal in N2 atmosphere. The conditions of the postanneal initial acceptor concentration and the temperature are varied. Solar cells are characterized with current-voltage and capacitance-voltage measurements. Efficiencies up to 12% with an open-circuit voltage (Voc ) of >640 mV were achieved after the KF treatment. From SCAPS simulations and temperature dependent current voltage measurements, it is concluded that the Voc of these cells are limited by backcontact surface recombination and, thus, further improvements require passivation of the back contact.

Published
2020
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16. Immunoglobulin, glucocorticoid, or combination therapy for multisystem inflammatory syndrome in children: a propensity-weighted cohort study

Author

Channon-Wells, Samuel, Vito, Ortensia, McArdle, Andrew J, Seaby, Eleanor G, Patel, Harsita, Shah, Priyen, Pazukhina, Ekaterina, Wilson, Clare, Broderick, Claire, D'Souza, Giselle, Keren, Ilana, Nijman, Ruud G, Tremoulet, Adriana, Munblit, Daniel, Ulloa-Gutierrez, Rolando, Carter, Michael J, Ramnarayan, Padmanabhan, De, Tisham, Hoggart, Clive, Whittaker, Elizabeth, Herberg, Jethro A, Kaforou, Myrsini, Cunnington, Aubrey J, Blyuss, Oleg, Levin, Michael, Chouli, Mohamed, Hamadouche, Nacera, Ladj, Mohamed Samir, Agrimbau Vázquez, Jorge, Carmona, Rodrigo, Collia, Adrian Gustavo, Ellis, Alejandro, Natta, Diego, Pérez, Laura, Rubiños, Mayra, Veliz, Natalia, Yori, Silvana, Britton, Philip N., Burgner, David P., Carey, Emma, Crawford, Nigel W., Giuliano, Hayley, McMinn, Alissa, Wong, Shirley, Wood, Nicholas, Holter, Wolfgang, Krainz, Matthias, Ulreich, Raphael, Zurl, Christoph, Dehoorne, Jo, Haerynck, Filomeen, Hoste, Levi, Schelstraete, Petra, Vandekerckhove, Kristof, Willems, Jef, Almeida Farias, Camila Giuliana, Almeida, Flávia Jacqueline, Alves Leal, Izabel, Araujo da Silva, André Ricardo, Araujo e Silva, Anna Esther, Barreiro, Sabrina T.A., Bomfim Prado da Silva, Daniella Gregória, Cervi, Maria Celia, dos Santos Naja Cardoso, Mirian Viviane, Henriques Teixeira, Cristiane, Jarovsky, Daniel, Martins Araujo, Julienne, Naaman Berezin, Eitan, Palazzi Sáfadi, Marco Aurélio, Paternina-de la Ossa, Rolando Andres, Souza Vieira, Cristina, Dimitrova, Anna, Ganeva, Margarita, Stefanov, Stefan, Telcharova-Mihaylovska, Albena, Biggs, Catherine M., Lopez, Alison, Scuccimarri, Rosie, Tan, Ryan, Wasserman, Sam, Withington, Davinia, Ampuero, Camila, Aravena, Javiera, Bustos B, Raul, Casanova, Daniel, Cruces, Pablo, Diaz, Franco, García-Salum, Tamara, Godoy, Loreto, Medina, Rafael A., Valenzuela Galaz, Gonzalo, Camacho-Moreno, Germán, Avila-Aguero, María L., Brenes-Chacón, Helena, Camacho-Badilla, Kattia, Ivankovich-Escoto, Gabriela, Naranjo-Zuniga, Gabriela, Soriano-Fallas, Alejandra, Yock-Corrales, Adriana, Amer, Maysa Abbas, Abdelmeguid, Yasmine, Ahmed, Yomna H.H.Z., Badib, Adham, Badreldin, Karim, Elkhashab, Yara, Heshmat, Hassan, Hussein, Amna, Mohamed Hussein, Amna Hussein, Ibrahim, Sandra, Shoman, Walaa, Yakout, Radwa M, Heinonen, Santtu, Angoulvant, François, Belot, Alexandre, Ouldali, Naïm, Beske, Florian, Heep, Axel, Masjosthusmann, Katja, Reiter, Karl, van den Heuvel, Ingeborg, von Both, Ulrich, Agrafiotou, Aikaterini, Antachopoulos, Charalampos, Charisi, Konstantina, Eleftheriou, Irini, Farmaki, Evangelia, Fotis, Lampros, Kafetzis, Dimitrios, Koletsi, Patra, Kourtesi, Katerina, Lampidi, Stavroula, Liakopoulou, Theodota, Maritsi, Despoina, Michailidou, Elisa, Milioudi, Maria, Mparmpounaki, Ioanna, Papadimitriou, Eleni, Papaevangelou, Vassiliki, Roilides, Emmanuel, Tsiatsiou, Olga, Tsolas, Georgios, Tsolia, Maria, Vantsi, Petrina, Banegas Pineda, Linda Yajeira, Borjas Aguilar, Karla Leversia, Cantillano Quintero, Edwin Mauricio, Ip, Patrick, Kwan, Mike Yat Wah, Kwok, Janette, Lau, Yu Lung, To, Kelvin, Wong, Joshua Sung Chih, David, Mate, Farkas, David, Kalcakosz, Szofia, Szekeres, Klaudia, Zsigmond, Borbala, Aslam, Nadeem, Luder, Anthony, Andreozzi, Laura, Bianco, Francesco, Bucciarelli, Valentina, Buonsenso, Danilo, Cimaz, Rolando, De Luca, Maia, Dellepiane, Rosa Maria, Fabi, Marianna, Filice, Emanuele, Lanari, Marcello, Lo Vecchio, Andrea, Mastrolia, Maria Vincenza, Mauro, Angela, Mazza, Angelo, Papa, Mario Virgilio, Romani, Lorenza, Scarano, Sara Maria, Simonini, Gabriele, Tipo, Vincenzo, Verdoni, Lucio, Macharia, Anne-Marie, Musiime, Grace, Reel, Bhupi, Wangai, Frederick, Pace, David, Torpiano, Paul, Anaya-Enriquez, Nancy, Carreon-Guerrero, Juan Manuel, Chacon-Cruz, Enrique, Cheung López, Mariana, Faugier Fuentes, Enrique, Fonseca Flores, Marisol, García-Domínguez, Miguel, Giron Vargas, Ana Luisa, Lopez-Delgado, Ivan, Lopez Hernández, Liliana, Menchaca Aguayo, Hector F., Montaño-Duron, Jesus Gilberto, Pérez-Gaxiola, Giordano, Ramos Tiñini, Pamela, Tostado-Morales, Edgardo, Valadez, Julio, Inchley, Christopher, Klevberg, Sjur, Knudsen, Per Kristian, Måseide, Per Helge, Carrera, Jose Manuel, Castaño, Elizabeth, Daza Timana, Carlos Alberto, De Leon, Tirza, Estripeaut, Dora, Levy, Jacqueline, Norero, Ximena, Record, Javier, Rojas-Bonilla, Magda, Wong, Mayra, Iramain, Ricardo, Hernandez, Roger, Huamán, Gian, Munaico, Manuel, Peralta, Carlos, Seminario, Diego, Zapata Yarlequé, Elmer Hans, Gadzinska, Justyna, Ludwikowska, Kamila, Mandziuk, Joanna, Okarska-Napierała, Magdalena, Alacheva, Zalina A., Alexeeva, Ekaterina, Ananin, Petr V., Antsupova, Margarita, Bakradze, Maya D., Berbenyuk, Anna, Bobkova, Polina, Borzakova, Svetlana, Chashchina, Irina L., El-Taravi, Yasmin, Fisenko, Andrey P., Gautier, Marina S., Glazyrina, Anastasia, Gorlenko, Cyrill, Grosheva, Mariia, Kiselev, Herman, Kondrikova, Elena, Korobyants, Evgeniya, Korsunskiy, Anatoliy A., Kovygina, Karina, Krasnaya, Ekaterina, Kurbanova, Seda, Kurdup, Maria K., Mamutova, Anna V., Mazankova, Lyudmila, Mitushin, Ilya L., Nargizyan, Anzhelika, Orlova, Yanina O., Osmanov, Ismail M., Polyakova, Anastasia S., Pushkareva, Anna, Romanova, Olga, Samitova, Elmira, Shvedova, Anastasia, Sologub, Anna, Iakovleva, Ekaterina, Tepaev, Rustem F., Tkacheva, Anna A., Yegiyan, Margarita, Yusupova, Valeriya, Zholobova, Elena, Grasa, Carlos Daniel, Epalza, Cristina, Lopez Segura, Nuria, Martinon-Torres, Federico, Melendo, Susana, Mendez-Echevarria, Ana, Mesa Guzmán, Juan Miguel, Palacios Argueta, Jorge Roberto, Rivero-Calle, Irene, Rivière, Jacques, Rodríguez-González, Moisés, Rojo, Pablo, Sanchez Manubens, Judith, Soler-Palacin, Pere, Soriano-Arandes, Antoni, Tagarro, Alfredo, Villaverde, Serena, Altman, Maria, Brodin, Petter, Horne, AnnaCarin, Palmblad, Karin, Brotschi, Barbara, Meyer Sauteur, Patrick, Pachlopnik Schmid, Jana, Prader, Seraina, Relly, Christa, Schlapbach, Luregn J., Seiler, Michelle, Strasser, Sophie, Trück, Johannes, Weber, Kathrin, Wütz, Daniela, Hamdan, Alaa, Melhem, Ibrahim, Moussa, Ahmed, Dunk, Joke, Ketharanathan, Naomi, Vermont, Clementien, Akyüz Özkan, Esra, Cetin, Benhur Sirvan, Erdeniz, Emine Hafize, Şahin, Irfan Oğuz, Borisova, Galina, Boyarchuk, Oksana, Boychenko, Lidiya, Boyko, Yaryna, Diudenko, Nadiia, Dyvonyak, Olha, Kasiyan, Olexandr, Katerynych, Kostiantyn, Kostyuchenko, Larysa, Mamenko, Marina, Melnyk, Kateryna, Miagka, Nelia, Nazarenko, Liliya, Nezgoda, Iryna, Rykova, Stanislava, Svyst, Olga, Teslenko, Maria, Trykosh, Mykola, Vasilenko, Nataliya, Volokha, Alla, Adams, Charlotte, Akomolafe, Toju, Al-Abadi, Eslam, Alders, Nele, Alifieraki, Styliani, Ansumanu, Hareef, Aston, Emily, Avram, Paula, Bamford, Alasdair, Banks, Millie, Basu Roy, Robin, Beattie, Thomas, Boleti, Olga, Bracken, Abbey, Broad, Jonathan, Cai, James, Carrol, Enitan D., Carter, Michael, Chandran, Anchit, Charlesworth, James, Chawla, Jaya, Cooper, Hannah, Cooray, Samantha, Davies, Patrick, Davis, Francesca, Drysdale, Simon B., Dzora, Ella, Emonts, Marieke, Evans, Ceri, Fidler, Katy, Foster, Caroline, Gong, Chen, Gongrun, Berin, Gonzalez, Carmen, Gorgun, Berin, Grandjean, Louis, Grant, Karlie, Guo, Jonathan, Hacohen, Yael, Hall, Jack, Hamid, Hytham K.S., Hassell, Jane, Hesketh, Christine, Hewlett, Jessica, Hnieno, Ahmad, Holt-Davis, Hannah, Hossain, Aleena, Hu, Shiying, Hudson, Lee D., Jheeta, Sharon, Johnson, Mae, Johnson, Sarah, Jyothish, Deepthi, Kampmann, Beate, Kavirayani, Akhila, Kelly, Deborah, Kirubakaran, Arangan, Kucera, Filip, Langer, Daniel, Lawson, George, Lees, Emily A, Lenihan, Rebecca, Lillie, Jon, Longbottom, Katherine, Lyall, Hermione, Mackdermott, Niamh, Maltby, Sarah, Mclelland, Thomas, McMahon, Anne-Marie, Miller, Danielle, Miranda, Mariana, Mirza, Luwaiza, Morrison, Zoe, Moshal, Karyn, Muller, Jennifer, Musuka, Phoebe, Myttaraki, Evangelia, Nadel, Simon, Nair, Sreedevi, Nuttall, Luke, Oremakinde, Oyinkansola, Osaghae, Daniella, Osman, Fatima, Ostrzewska, Anna, Paccagnella, Davide, Panthula, Mrinalini, Papachatzi, Eleni, Papadopoulou, Charalampia, Patel, Fahim, Payne, Helen, Penner, Justin, Polandi, Shervin, Prendergast, Andrew J., Ranasinghe, Lasith, Ravichandran, Muthukumaran, Rhys-Evans, Sophie, Riordan, Andrew, Rodrigues, Charlene M.C., Roe, Lauren, Romaine, Sam, Schobi, Nina, Seddon, James, Shingadia, Delane, Sikdar, Oishi, Srivastava, Anand, Struik, Siske, Sun, Thomas, Tan, Rachel Wei, Taylor, Alice, Taylor, Amanda, Taylor, Andrew, Tran, Steven, Tsagkaris, Stavros, Tudor-Williams, Gareth, van den Berg, Sarah, van der Velden, Fabian, Ventilacion, Lyn, Wellman, Paul A., Withers Green, Joseph, Yanney, Michael P., Yeung, Shunmay, Badheka, Aditya, Badran, Sarah, Bailey, Dwight M., Burch, Anna Kathryn, Burns, Jane C., Cichon, Catherine, Cirks, Blake, Dallman, Michael D., Delany, Dennis R., Fairchok, Mary, Friedman, Samantha, Geracht, Jennifer, Langs-Barlow, Allison, Mann, Kelly, Padhye, Amruta, Quade, Alexis, Ramirez, Kacy Alyne, Rockett, John, Sayed, Imran Ali, Santos, Roberto P., Shahin, Amr A., Umaru, Samuel, Widener, Rebecca, Mujuru, Hilda Angela, Kandawasvika, Gwendoline, and Best Available Treatment Study (BATS) consortium, on behalf of the

Subjects
Rheumatology, Immunology, Medicine and Health Sciences, Immunology and Allergy
Abstract

Background Multisystem inflammatory syndrome in children (MIS-C), a hyperinflammatory condition associated with SARS-CoV-2 infection, has emerged as a serious illness in children worldwide. Immunoglobulin or glucocorticoids, or both, are currently recommended treatments. Methods The Best Available Treatment Study evaluated immunomodulatory treatments for MIS-C in an international observational cohort. Analysis of the first 614 patients was previously reported. In this propensity-weighted cohort study, clinical and outcome data from children with suspected or proven MIS-C were collected onto a web-based Research Electronic Data Capture database. After excluding neonates and incomplete or duplicate records, inverse probability weighting was used to compare primary treatments with intravenous immunoglobulin, intravenous immunoglobulin plus glucocorticoids, or glucocorticoids alone, using intravenous immunoglobulin as the reference treatment. Primary outcomes were a composite of inotropic or ventilator support from the second day after treatment initiation, or death, and time to improvement on an ordinal clinical severity scale. Secondary outcomes included treatment escalation, clinical deterioration, fever, and coronary artery aneurysm occurrence and resolution. This study is registered with the ISRCTN registry, ISRCTN69546370. Findings We enrolled 2101 children (aged 0 months to 19 years) with clinically diagnosed MIS-C from 39 countries between June 14, 2020, and April 25, 2022, and, following exclusions, 2009 patients were included for analysis (median age 8·0 years [IQR 4·2–11·4], 1191 [59·3%] male and 818 [40·7%] female, and 825 [41·1%] White). 680 (33·8%) patients received primary treatment with intravenous immunoglobulin, 698 (34·7%) with intravenous immunoglobulin plus glucocorticoids, 487 (24·2%) with glucocorticoids alone; 59 (2·9%) patients received other combinations, including biologicals, and 85 (4·2%) patients received no immunomodulators. There were no significant differences between treatments for primary outcomes for the 1586 patients with complete baseline and outcome data that were considered for primary analysis. Adjusted odds ratios for ventilation, inotropic support, or death were 1·09 (95% CI 0·75–1·58; corrected p value=1·00) for intravenous immunoglobulin plus glucocorticoids and 0·93 (0·58–1·47; corrected p value=1·00) for glucocorticoids alone, versus intravenous immunoglobulin alone. Adjusted average hazard ratios for time to improvement were 1·04 (95% CI 0·91–1·20; corrected p value=1·00) for intravenous immunoglobulin plus glucocorticoids, and 0·84 (0·70–1·00; corrected p value=0·22) for glucocorticoids alone, versus intravenous immunoglobulin alone. Treatment escalation was less frequent for intravenous immunoglobulin plus glucocorticoids (OR 0·15 [95% CI 0·11–0·20]; p

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