Search

This document lists the MITICA Central CODAS and networks requirements.

This report describes the activities carried out within the subtask T5.7 of the Work Programme WP2019 at the High Voltage Padova Test Facility HVPTF and on the new High Voltage Short Gap Test Facility HVSGTF. The activities mainly consisted in: 1) Test of two electrodes with double-polarity configurations (Common Mode Voltage tests). 2) Test of electropolished electrodes 3) Tests with cathode covered by a thick alumina cap 4) Removal of dust deposited inside the vacuum vessel before starting the vacuum system: 5) Tests with specific shaped electrodes designed to understand the effect of the mutual exchange of charged particles between electrodes are still in progress 6) Tests of Non Evaporable Getter (NEG) pumps at high voltage in high vacuum are still in progress 7) Ordinary Maintenance of the vacuum pump system 8) Tests in HVSGTF to measure the Fowler-Nordheim emission current from stainless steel electrodes. The activities mentioned in points #5 and #6 are still in progress and will be completed next year. Concerning the other experiments, the main outcomes can be reported as follows: 1) CMV tests showed that the main microdischarge activity of the electrodes appears to be related to phenomena involving only a single power supply unit and the vacuum chamber, rather than the two electrodes under test 2) Test of electropolished electrodes, tests with cathode covered by a thick alumina cap and Removal of dust deposited inside the vacuum vessel did not indicate significant improvements of voltage holding 3) The measurement of the Fowler-Nordheim emission current from stainless steel electrodes showed a behaviour much more complex than expected and their analysis is in progress.

In questo rapporto tecnico si evidenziano brevemente - senza scendere troppo in particolari tecnici - i vantaggi ottenuti con il nuovo cluster di server l inux per il High Performance Co mputing che è stato realizzato nell'arco degli ultimi 24 mesi al Consorzio RFX. Il sistema è risultato necessario - quando non indispensabile - per la progettazione e la soluzione di problemi scientifici relativi ai progetti RFX - MOD2, SPIDER, MITICA e DTT. Il progetto ha coinvolto tutto il personale del Servizio Information Technology del Consorzio RFX: in particolare, sono state necessarie le competenze nella progettazione dei sistemi e della rete, nella messa a punto di soluzioni inn ovative, nell'installazione delle applicazioni sui server e su tutti i pc dei ricercatori del Consorzio e nella implementazione del backup dei dati.

This report describes the main activities carried out at the High Voltage Padova Test Facility HVPTF in 2018 and the ones related to the installation of a new high voltage test stand at the Consorzio RFX . The activities of the subtask 5.7 have been carried out according with the Work Programme (WP) 2018 between F4E and the Consorzio RFX, agreement on the Neutral Beam Test Facility. The activities mainly consisted in: ? studying of the X-ray spectra to investigate the nature of the physical phenomena which occurs during the high voltage conditioning ? testing instrumentation for precise current measurements and for determining type and position of discharges (visible imaging, IR imaging, RX spectra and Residual Gas Analyzer) ? maintenance of both positive and negative HV power supplies and the refurbishment of high voltage ceramic feedthroughs ? evaluation of other methods for improving voltage holding capabilities: tests of surface treatments on electrodes (e.g. alumina spray) ? testing the behaviour of "transparent anodes", i.e. anodes in which the surface is screened by a thin metallic mesh, aimed at zeroing the electric field at surface behind ? experimental study of two-electrode configurations subjected to a combination of Common-Mode Voltage (CMV) and differential-mode voltage to understand the different contribution of anode and cathode on the discharge initiation ? ordinary maintenance of the vacuum plant and controlling system ? construction of a small experimental set-up to measure with sufficient accuracy the FN emission insulating the electrodes by short vacuum gaps, the experimental set up has been called High Voltage Short Gap Test Facility (HVSGTF) The activity mentioned at the last point is partially reported in sec. 10. The specific technical note T5.7 - P1.4_RFX-IE-TN-59 has been prepared to indicate the data for the radiological safety assessment of the HVSGTF.

The activities carried out in 2017 under the RF R&D subtask (5.8) of the 2017 Work Programme were focused in particular on the commissioning, first operation and further development of the High Voltage Radio Frequency Test Facility (HVRFTF): a simple, accessible and flexible test bed to characterize the dielectric strength in vacuum of the RF drivers of SPIDER and MITICA ion sources and address the issues related to their voltage hold off when subjected to their operational radiofrequency E - fields and pressure.

This report describes the main activities carried out at the High Voltage Padova Test Facility HVPTF in 2017. According with the Work Program (WP) 2017, the activities were focused mainly in: - Studying of the X-ray spectra to investigate the nature of the physical phenomena which occurs during the high voltage conditioning - Implementing an effective automatic procedure to define a reproducible high voltage test Method - testing alternative conditioning techniques to treat the electrode surfaces before applying the DC high voltage in high vacuum - comparing of breakdown voltage statistics from QST labs and HVPTF - calibrating the Voltages measured by the high voltage power supplies - Extending the duration of the High Voltage tests - Concluding the HV tests of a post insulator prototype foreseen in WP2016 As usual, activities concerning ordinary maintenance on the vacuum plant and controlling system have been done during the year.

This document is the as built design report of the SPIDER Computers and Data Storage.

This document represents the report of the Site Acceptance Tests of the SPIDER Computers and Data Storage equipment.

This document reports the hardware design of the Central CODAS computer and data storage Systems.

Questo documento contiene le specifiche tecniche per la fornitura del Data Center della Neutral Beam Test Facility (NBTF) composto da armadi rack 19" per l'alloggiamento di server e dispositive di rete . Il data center sarà installato nella sala denominata PRIMA Computer Room nell'edificio NBTF presso il Consorzio RFX. This document is written in Italian as it is targeted to local suppliers.

Il server RO1 ha lo scopo di interfacciare i Serial Highway Driver CAMAC attraverso dei collegamenti SCSI. La funzionalità del server RO1 deve essere sempre garantita perché consente la comunicazione con il sistema CAMAC, indispensabile per l'esperimento RFX. Questo documento ha lo scopo di descrivere le operazioni che devono essere eseguite dal Servizio Calcolo per garantire la corretta sostituzione di RO1.

This document is written in Italian as it is targeted to local suppliers. It includes the technical specification for the procurement of the SPIDER Central CODAS Computers.

In modo sintetico e compiuto, le poche pagine a disposizione introducono e spiegano le Parole Chiave delle nuvo Indicazioni Nazionali per il Curricolo del Primo Ciclo di Istruzione (scuola primaria e secondaria di primo grado) pubblicate dal Ministero nel 2012. Dopo breve distinzione tra "Indicazioni" e "Programmi Ministeriali", vengono illustrati i concetti che spiegano termini come: Educazione Fisica, Corpo, Movimento, Gioco, Gioco-sport, Sport. Le parole vengono rivestite del loro significato educativo, del loro senso pedagogico, della loro funzione epistemologica. Oltre il senso dei termini stessi, si dischiude il campo educativo scolastico e i dispositivi formativi ad esso connessi attraverso una sintesi che può rappresentare una "bussola , una chiave per orientare la professionalità dell'insegnante nell'importante compito di formazione della persona. Per la brevità della trattazione, il contenuto è rivolto a educatori esperti, che padroneggiano già il costrutto della disciplina e che possono aprire gli orizzonti celati dietro le "parole" descritte in una sintesi breve ma completa.