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Your search keyword '"Han, J. H."' showing total 23 results
Start Over Author "Han, J. H." Publisher elsevier bv
23 results on '"Han, J. H."'

3. Performance of the ISS-CREAM calorimeter in a calibration beam test

Author

Zhang, H. G., Angelaszek, D., Copley, M., Han, J. H., Huh, H. G., Hwang, Y. S., Hyun, H. J., Jeon, J. A., Kim, K. C., Kim, M. H., Kim, H. J., Kwashnak, K., Lee, H. Y., Lee, J., Lee, M. H., Lundquist, J., Lutz, L., Malinin, A., Park, H., Park, J. M., Picot-Clemente, N., Seo, E. S., Smith, J., Wu, J., Yin, Z. Y., and Yoon, Y. S.

Subjects
Physics, Range (particle radiation), Physics - Instrumentation and Detectors, Large Hadron Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Attenuation, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Instrumentation and Detectors (physics.ins-det), Electron, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, 0103 physical sciences, Calibration, business, 010303 astronomy & astrophysics, Beam (structure)
Abstract

The Cosmic Ray Energetics And Mass experiment for the International Space Station (ISS-CREAM) was installed on the ISS to measure high-energy cosmic-ray elemental spectra for the charge range $\rm Z=1$ to 26. The ISS-CREAM instrument includes a tungsten scintillating-fiber calorimeter preceded by a carbon target for energy measurements. The carbon target induces hadronic interactions, and showers of secondary particles develop in the calorimeter. The energy deposition in the calorimeter is proportional to the particle energy. As a predecessor to ISS-CREAM, the balloon-borne CREAM instrument was successfully flown seven times over Antarctica for a cumulative exposure of 191 days. The CREAM calorimeter demonstrated its capability to measure energies of cosmic-ray particles, and the ISS-CREAM calorimeter is expected to have a similar performance. Before the launch, an engineering-unit calorimeter was shipped to CERN for calibration and performance tests. This beam test included position, energy, and angle scans of electron and pion beams together with a high-voltage scan for calibration and characterization. Additionally, an attenuation effect in the scintillating fibers was studied. In this paper, beam test results, including corrections for the attenuation effect, are presented., 23 pages, 18 figures

Published
2021

7. Experimental characterization and numerical simulations of the electron source at PITZ

Author

Abrahamyan, K., Bähr, J., Petrossyan, B., Pose, D., Richter, D., Schreiber, S., Staykov, L., Stephan, F., Ovsyannikov, D., Berz, M., Makino, K., Carneiro, J. P., Flöttmann, K., Han, J. H., v. Hartrott, M., Krasilnikov, M., Lipka, D., Miltchev, V., and Oppelt, A.

Subjects
Free electron model, Physics, Nuclear and High Energy Physics, business.industry, DESY, Electron, Laser, law.invention, Transverse plane, Optics, law, Cathode ray, Physics::Accelerator Physics, ddc:530, Thermal emittance, business, Instrumentation, Beam (structure)
Abstract

The Photo Injector Test facility at DESY Zeuthen (PITZ) works on the optimization of electron sources for Free Electron Lasers (FELs). The main motivation and challenge of PITZ is the production of electron beams with high charge and small normalized transverse emittance. Recent results of electron beam studies at PITZ are presented in this paper. The experimental characterization of the electron source is discussed together with beam dynamics simulations.

Published
2006

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