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Weekly meeting on Xboxes
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18/3-008 - CLIC Meeting room (CERN)
Description
https://cern.zoom.us/j/6910405761
Weekly meeting on Xboxes
Zoom Meeting ID
64847033219
Host
Nuria Catalan Lasheras
Alternative host
Marçà Boronat
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Xboxes weekly meeting. 06.12.2023
Attending: Paz Alonso Arias (PAA), Mareike Wendelmuth (MW), Matteo Volpi (MV), Walter Wuensch (WW), Alexei Grudiev (AG), Anisullah Baig (AB), Lee Millar (LM)
CERN Xboxes news. Xbox2. Current DUT Setpoint is 30MW, klystron at around 15MW.
MW explains problems during calibration. BD of load with shorter pulses at 7MW, but not at 23MW with longer pulses. Also, now looking at the pulses, we see that PERB is not going higher than threshold but flag is being raised. PAA comments that this could be due to acquisition problem, WW agrees.
IS says that pulses cannot be longer than 300ns due to cavities. Correction cavities limits flat part of pulse to 240ns. First pulse tells parameters of correction cavity. AG comments that weird behaviour after compressed pulse could be due to this, trying to do 300ns pulse. IS says pulse will be square if we switch phase before.
WW says procedure should be going to shorter pulse, fix acquisition problem, and go up in power to higher gradients than before with shorter pulse.
AG says 72MV/m is nominal, not worst condition for structure, so effectively we would need around 60MW. From klystron point of view it should be no problem to achieve this (when it was 50-50 operation, we achieved more than 35MW in each structure).
WW says goal should be now to achieve 62MW in structure B, ramping up in power for shorter pulse. Then, increase pulse length.
Xbox3 Klystron characterisation. No news. Still waiting for flow meters for calorimetry. PAA comments it's likely that we can't start with calorimetry meas. until January
Melbox. No news from Melbourne
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