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Title: RF pulse shape control in the compact linear collider test facility

Abstract

The Compact Linear Collider (CLIC) is a study for an electron–positron machine aiming at accelerating and colliding particles at the next energy frontier. The CLIC concept is based on the novel two-beam acceleration scheme, where a high-current low-energy drive beam generates RF in series of power extraction and transfer structures accelerating the low-current main beam. To compensate for the transient beam-loading and meet the energy spread specification requirements for the main linac, the RF pulse shape must be carefully optimized. This was recently modelled by varying the drive beam phase switch times in the sub-harmonic buncher so that, when combined, the drive beam modulation translates into the required voltage modulation of the accelerating pulse. In this paper, the control over the RF pulse shape with the phase switches, that is crucial for the success of the developed compensation model, is studied. The results on the experimental verification of this control method are presented and a good agreement with the numerical predictions is demonstrated. Implications for the CLIC beam-loading compensation model are also discussed.

Authors:
 [1];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Sponsoring Org.:
USDOE
OSTI Identifier:
1457774
Grant/Contract Number:  
[AC02-76SF00515]
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
[ Journal Volume: 897]; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; compact linear collider; RF production; test facility; electromagnetic simulations; pulse shape; beam loading compensation

Citation Formats

Kononenko, Oleksiy, and Corsini, Roberto. RF pulse shape control in the compact linear collider test facility. United States: N. p., 2018. Web. doi:10.1016/j.nima.2018.04.050.
Kononenko, Oleksiy, & Corsini, Roberto. RF pulse shape control in the compact linear collider test facility. United States. doi:10.1016/j.nima.2018.04.050.
Kononenko, Oleksiy, and Corsini, Roberto. Fri . "RF pulse shape control in the compact linear collider test facility". United States. doi:10.1016/j.nima.2018.04.050. https://www.osti.gov/servlets/purl/1457774.
@article{osti_1457774,
title = {RF pulse shape control in the compact linear collider test facility},
author = {Kononenko, Oleksiy and Corsini, Roberto},
abstractNote = {The Compact Linear Collider (CLIC) is a study for an electron–positron machine aiming at accelerating and colliding particles at the next energy frontier. The CLIC concept is based on the novel two-beam acceleration scheme, where a high-current low-energy drive beam generates RF in series of power extraction and transfer structures accelerating the low-current main beam. To compensate for the transient beam-loading and meet the energy spread specification requirements for the main linac, the RF pulse shape must be carefully optimized. This was recently modelled by varying the drive beam phase switch times in the sub-harmonic buncher so that, when combined, the drive beam modulation translates into the required voltage modulation of the accelerating pulse. In this paper, the control over the RF pulse shape with the phase switches, that is crucial for the success of the developed compensation model, is studied. The results on the experimental verification of this control method are presented and a good agreement with the numerical predictions is demonstrated. Implications for the CLIC beam-loading compensation model are also discussed.},
doi = {10.1016/j.nima.2018.04.050},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = ,
volume = [897],
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1. Fig. 1.: A schematic layout of CLIC for the nominal 3 TeV version, featuring drive beam accelerators, delay loops and combiner rings as well as the main beam injectors, damping rings and two-beam linear accelerators.

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