Design and operation of a current monitor under heavy heat load

P. A. Duperrex; P. Baumann; S. Joray; D. Kiselev; Y. Lee; U. Müller

Design and operation of a current monitor under heavy heat load

P. A. Duperrex, P. Baumann, S. Joray, D. Kiselev, Y. Lee, U. Müller

Research output: Contribution to conference › Paper › peer-review

6 Scopus citations

Abstract

For high intensity beam operation (3 mA, 1.8 MW) in the PSI 590 MeV 50 MHz cyclotron, a new current monitor for proton beams has been built. This monitor uses a re-entrant cavity tuned at the 2nd RF harmonic. Compared to the current monitors already in operation, the design has improved cooling. The circuit resonance has been optimized in the laboratory to minimize the gain drift due to temperature changes. Energy deposition simulations and thermal analysis were performed to estimate the cooling efficiency, and preliminary results indicate that the temperature rise of the resonator corresponds to values predicted with MARS. Anomalous gain drift is nevertheless observed even with an active cooling system. A drift compensation scheme using a pilot signal 600 kHz off the designed resonator frequency is being presently tested and the preliminary results are encouraging.

Original language	English
Pages	336-338
Number of pages	3
State	Published - 2009
Externally published	Yes
Event	9th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2009 - Basel, Switzerland Duration: May 25 2009 → May 27 2009

Conference

Conference	9th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2009
Country/Territory	Switzerland
City	Basel
Period	05/25/09 → 05/27/09

Cite this

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title = "Design and operation of a current monitor under heavy heat load",

abstract = "For high intensity beam operation (3 mA, 1.8 MW) in the PSI 590 MeV 50 MHz cyclotron, a new current monitor for proton beams has been built. This monitor uses a re-entrant cavity tuned at the 2nd RF harmonic. Compared to the current monitors already in operation, the design has improved cooling. The circuit resonance has been optimized in the laboratory to minimize the gain drift due to temperature changes. Energy deposition simulations and thermal analysis were performed to estimate the cooling efficiency, and preliminary results indicate that the temperature rise of the resonator corresponds to values predicted with MARS. Anomalous gain drift is nevertheless observed even with an active cooling system. A drift compensation scheme using a pilot signal 600 kHz off the designed resonator frequency is being presently tested and the preliminary results are encouraging.",

author = "Duperrex, {P. A.} and P. Baumann and S. Joray and D. Kiselev and Y. Lee and U. M{\"u}ller",

year = "2009",

language = "English",

pages = "336--338",

note = "9th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2009 ; Conference date: 25-05-2009 Through 27-05-2009",

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TY - CONF

T1 - Design and operation of a current monitor under heavy heat load

AU - Duperrex, P. A.

AU - Baumann, P.

AU - Joray, S.

AU - Kiselev, D.

AU - Lee, Y.

AU - Müller, U.

PY - 2009

Y1 - 2009

N2 - For high intensity beam operation (3 mA, 1.8 MW) in the PSI 590 MeV 50 MHz cyclotron, a new current monitor for proton beams has been built. This monitor uses a re-entrant cavity tuned at the 2nd RF harmonic. Compared to the current monitors already in operation, the design has improved cooling. The circuit resonance has been optimized in the laboratory to minimize the gain drift due to temperature changes. Energy deposition simulations and thermal analysis were performed to estimate the cooling efficiency, and preliminary results indicate that the temperature rise of the resonator corresponds to values predicted with MARS. Anomalous gain drift is nevertheless observed even with an active cooling system. A drift compensation scheme using a pilot signal 600 kHz off the designed resonator frequency is being presently tested and the preliminary results are encouraging.

AB - For high intensity beam operation (3 mA, 1.8 MW) in the PSI 590 MeV 50 MHz cyclotron, a new current monitor for proton beams has been built. This monitor uses a re-entrant cavity tuned at the 2nd RF harmonic. Compared to the current monitors already in operation, the design has improved cooling. The circuit resonance has been optimized in the laboratory to minimize the gain drift due to temperature changes. Energy deposition simulations and thermal analysis were performed to estimate the cooling efficiency, and preliminary results indicate that the temperature rise of the resonator corresponds to values predicted with MARS. Anomalous gain drift is nevertheless observed even with an active cooling system. A drift compensation scheme using a pilot signal 600 kHz off the designed resonator frequency is being presently tested and the preliminary results are encouraging.

UR - http://www.scopus.com/inward/record.url?scp=84879982424&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84879982424

SP - 336

EP - 338

T2 - 9th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2009

Y2 - 25 May 2009 through 27 May 2009

ER -

Design and operation of a current monitor under heavy heat load

Abstract

Conference

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