Lattice Design for 5MeV-125mA CW RFQ Operation in the LIPAc

Shimosaki, Y.; Bellan, Luca; Lasala, Beatriz Brañas; Cara, Philippe; Chauvin, Nicolas; Comunian, M.; Duglue, D.; Dzitko, Hervé; Fagotti, E.; Heidinger, R.; Kasugai, Atsushi; Kobayashi, Hitoshi; Kondo, Keitaro; Oliver, C.; Pisent, A.; Podadera, Ivan; Sakamoto, K.; Sugimoto, M.; Takayama, Ken

doi:10.18429/jacow-ipac2019-mopts051

Cited by 1 publication

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The beam tracking simulation predicts the effective beam loss in the middle of the MEL and after the bending magnet. In the last beam operation, beam losses are undetectable for the ionization chambers with the present threshold and are in saturation for the 3 He detectors due to the background neutron scattering. Thus, plastic scintillators were used for this study at the above two locations.…”

Section: Measurement Of the Beam Lossmentioning

confidence: 89%

“…The LIPAc equips the ionization chamber, the 3 He detector, and the plastic scintillator along the beam line as the beam loss monitor. The beam tracking simulation predicts the effective beam loss in the middle of the MEL and after the bending magnet.…”

Section: Measurement Of the Beam Lossmentioning

confidence: 99%

“…The system aims to accelerate a continuous wave (CW) of 125 mA deuteron beam [2]. We are now in the third stage of the accelerator commissioning, called Phase-B+ [3], which is positioned between the Phase-B, RFQ acceleration, and the Phase-C, superconducting RF (SRF) LINAC [4] and the high-power beam dump [5]. One of the motivations of this intermediate commissioning phase is to study the beam property if the beam matches the SRF LINAC transmission.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Measurements of momentum halo due to the reduced RFQ voltage during the LIPAc beam commissioning

Hirosawa,

Bellan,

Benedetti

et al. 2024

J. Inst.

View full text Add to dashboard Cite

The Linear IFMIF Prototype Accelerator, LIPAc, is being commissioned aiming at validating the RFQ up to 5 MeV beam acceleration. Eventually, the nominal beam of 5 MeV–125 mA in 1 ms length and 1 Hz rate pulsed mode was achieved in 2019. The beam operation has been resumed since July 2023 after a 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. Furthermore, a beam simulation study suggested that the beam extracted from the RFQ includes considerable momentum halo when the vane voltage reduces by more than 5 %, with a slight decrease of the mean energy. It can be a potential source of a quench like the mismatched beam in the cryomodule. This could be studied by 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 beam commissioning phase, we studied them by scanning the RFQ voltage.

show abstract

Section: Measurement Of the Beam Lossmentioning

confidence: 89%

Section: Measurement Of the Beam Lossmentioning

confidence: 99%