| Title |
Measurements of Momentum Halo Due to the Reduced RFQ Voltage During the LIPAc Beam Commissioning |
| Authors |
- K. Hirosawa, A. De Franco, K. Hasegawa, K. Kondo, S. Kwon, K. Masuda, A. Mizuno, M. Sugimoto
QST Rokkasho, Aomori, Japan
- F. Bénédetti
CEA-DRF-IRFU, France
- Y. Carin, H. Dzitko, D. Gex, I. Moya, F. Scantamburlo
F4E, Germany
- J.C. Morales Vega
Consorcio IFMIF-DONES España, Granada, Spain
- I. Podadera
CIEMAT, Madrid, Spain
|
| Abstract |
The Linear IFMIF Prototype Accelerator, LIPAc, is being commissioned aiming in particular at validating the RFQ up to 5MeV beam acceleration. Eventually, the nominal beam of 5 MeV-125 mA in 1 ms/1 Hz pulsed mode was achieved in 2019. The beam operation has been resumed since July 2023 after long maintenance including recovery from unexpected problems in the RFQ RF system. This new phase aims at the commissioning of the full configuration except SRF linac, which is replaced by a temporary beam transport line. Focusing on the RFQ behavior, it will be interesting to operate it at higher duty especially for longer pulses. Indeed, a beam simulation study suggested that the beam extracted from the RFQ includes considerable momentum halo when the RFQ voltage reduces by a few percent, with a slight decrease of mean energy. It can be a potential source of quench like the mismatched beam in the cryomodule. This could be studied measuring the energy from the Time-of-Flight among multiple BPMs while monitoring beam loss around the dipole, where momentum halo should be lost. During the upcoming commissioning, we propose to study them by scanning the RFQ voltage.
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| Paper |
download TUA3I2.PDF [1.809 MB / 6 pages] |
| Slides |
download TUA3I2_TALK.PDF [4.465 MB] |
| Cite |
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| Conference |
HB2023 |
| Series |
ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (68th) |
| Location |
Geneva, Switzerland |
| Date |
09-13 October 2023 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Volker R.W. Schaa (GSI, Darmstadt, Germany); Jan Chrin (PSI, Villigen, Switzerland); Massimo Giovannozzi (CERN, Geneva, Switzerland); Dong Eon Kim (PAL, Pohang, South Korea); Marten H. Koopmans (CERN, Geneva, Switzerland); Anton Lechner (CERN, Geneva, Switzerland); Philippe Schoofs (CERN, Geneva, Switzerland) |
| Online ISBN |
978-3-95450-253-0 |
| Online ISSN |
2673-5571 |
| Received |
29 September 2023 |
| Revised |
06 October 2023 |
| Accepted |
11 October 2023 |
| Issued |
29 October 2023 |
| DOI |
doi:10.18429/JACoW-HB2023-TUA3I2 |
| Pages |
112-117 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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