COOL2021 - List of Authors (Myklebust, V.R.)

Paper	Title	Page
S302	Recommissioning of the CERN AD Stochastic Cooling System in 2021 after Long Shutdown 2	20
	W. Höfle, C. Carli, F. Caspers, B. Dupuy, D. Gamba, R. Louwerse, V.R. Myklebust, J.C. Oliveira, L. Ponce, S.F. Rey, L. Thorndahl CERN, Meyrin, Switzerland
	The power system of the Stochastic Cooling System of the anti-proton decelerator AD at CERN, installed on top of the shielding blocks of the AD ring, was completely dismantled during the long shutdown 2 (LS2) at the end of the 2018 run in order to gain access to the accelerator for magnet consolidation. At start-up, this required finding and verifying the correct delays for all 48 power amplifiers feeding to the two kickers by means of beam transfer functions for the two cooling plateaus at 3.57 GeV/c and 2 GeV/c. We describe the methods used for the setting up and the results of the optimization for the cooling in all three planes, longitudinal, horizontal and vertical. An experimental set-up has been put into operation for the automatic monitoring and correction of the notch position of the longitudinal cooling at 3.57 GeV/c with optical delay lines. We also comment on the lessons learnt during the recommissioning including the repair work for a vacuum leak in the water cooling circuits of the kicker following bake-out and the verification of the internal loads by RF reflectometry.
	Slides S302 [9.736 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2021-S302
About •	paper received ※ 02 November 2021 paper accepted ※ 19 December 2021 issue date ※ 06 December 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Recommissioning of the CERN AD Stochastic Cooling System in 2021 after Long Shutdown 2

20

W. Höfle, C. Carli, F. Caspers, B. Dupuy, D. Gamba, R. Louwerse, V.R. Myklebust, J.C. Oliveira, L. Ponce, S.F. Rey, L. Thorndahl
CERN, Meyrin, Switzerland

The power system of the Stochastic Cooling System of the anti-proton decelerator AD at CERN, installed on top of the shielding blocks of the AD ring, was completely dismantled during the long shutdown 2 (LS2) at the end of the 2018 run in order to gain access to the accelerator for magnet consolidation. At start-up, this required finding and verifying the correct delays for all 48 power amplifiers feeding to the two kickers by means of beam transfer functions for the two cooling plateaus at 3.57 GeV/c and 2 GeV/c. We describe the methods used for the setting up and the results of the optimization for the cooling in all three planes, longitudinal, horizontal and vertical. An experimental set-up has been put into operation for the automatic monitoring and correction of the notch position of the longitudinal cooling at 3.57 GeV/c with optical delay lines. We also comment on the lessons learnt during the recommissioning including the repair work for a vacuum leak in the water cooling circuits of the kicker following bake-out and the verification of the internal loads by RF reflectometry.

Slides S302 [9.736 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2021-S302

About •

paper received ※ 02 November 2021 paper accepted ※ 19 December 2021 issue date ※ 06 December 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)