TY - GEN
T1 - Simulation based analysis of the anomalous RF drifts of a current monitor at PSI proton accelerator facilities
AU - Lee, Y.
AU - Duperrex, P. A.
AU - Gandel, M.
AU - Kiselev, D.
AU - Mueller, U.
PY - 2010
Y1 - 2010
N2 - A new current monitor (MHC5) based on a re-entrant cavity tuned at the 2nd RF harmonic (101.26 MHz) has been in operation since April 2009 at PSI. It monitors the current of the high intensity 590 MeV proton beam at 8 m downstream of the graphite meson production target (TgE). The scattered particles and their secondaries from TgE introduce a heavy thermal load approximately of 230 W on MHC5 at 2 mA beam intensity, which is carried away by active water cooling. The inhomogeneous temperature profile in MHC5 results in thermomechanical deformations which leads to a change in its HF electromagnetic characteristics. Indeed, anomalous RF drifts were observed during initial operations, which had to be compensated for, to obtain correct beam current monitoring. In this paper, the physics of the observed RF drift is analyzed by using advanced multiphysics simulation technologies.
AB - A new current monitor (MHC5) based on a re-entrant cavity tuned at the 2nd RF harmonic (101.26 MHz) has been in operation since April 2009 at PSI. It monitors the current of the high intensity 590 MeV proton beam at 8 m downstream of the graphite meson production target (TgE). The scattered particles and their secondaries from TgE introduce a heavy thermal load approximately of 230 W on MHC5 at 2 mA beam intensity, which is carried away by active water cooling. The inhomogeneous temperature profile in MHC5 results in thermomechanical deformations which leads to a change in its HF electromagnetic characteristics. Indeed, anomalous RF drifts were observed during initial operations, which had to be compensated for, to obtain correct beam current monitoring. In this paper, the physics of the observed RF drift is analyzed by using advanced multiphysics simulation technologies.
UR - http://www.scopus.com/inward/record.url?scp=84886894446&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84886894446
SN - 9789290833529
T3 - IPAC 2010 - 1st International Particle Accelerator Conference
SP - 636
EP - 638
BT - IPAC 2010 - 1st International Particle Accelerator Conference
T2 - 1st International Particle Accelerator Conference, IPAC 2010
Y2 - 23 May 2010 through 28 May 2010
ER -