HB2014 - List of Authors (Sun, J.L.)

Paper	Title	Page
MOPAB47	Simulation of a New Beam Current Monitor Under Heavy Heat Load	151
	J.L. Sun, P.-A. Duperrex PSI, Villigen PSI, Switzerland
	Funding: "The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n.°290605 (PSIFELLOW/ COFUND)" At the Paul Scherrer Institute (PSI), the High Intensity Proton Accelerator (HIPA) feeds a spallation source target with protons. A beam current monitor installed 8 meters downstream from the target is heated by the scattered particles from the target. This thermal load on the monitor causes the resonance frequency to drift much more than expected. A novel new beam current monitor using graphite has been developed. In order to have a good understanding of its performance, the simulation software ANSYS has been used to carry out thermal and high frequency simulations. With this software, it was possible to perform a detailed design of the thermal self-compensation scheme and to check the structural stability of the whole system. In this paper, simulation results are presented to show that frequency and sensitivity drifts can be reduced to 8 kHz from previous 730 kHz when realistic operating conditions are assumed.

MOPAB48	Design of a New Beam Current Monitor Under Heavy Heat Load	154
	J.L. Sun, P.-A. Duperrex, G. Kotrle PSI, Villigen PSI, Switzerland
	Funding: The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n.°290605 (PSI-FELLOW/COFUND) At the Paul Scherrer Institute (PSI), a 590 MeV 50 MHz High Intensity Proton Accelerator (HIPA) has been operated for many years at 2.2 mA / 1.3 MW and it will be soon upgraded to 3 mA / 1.8 MW. A spallation source target is driven from the HIPA. Downstream from this target is a beam current monitor, called MHC5. The thermal load in MHC5 induced by the scattered particles from the target causes the resonance frequency of the current monitor to drift. Even with an active cooling system, the drift remains a problem. A new beam current monitor has been designed to overcome this shortcoming. The mechanical design of the new monitor has been completed and manufacturing will start soon. A novel feature is the use of graphite for the resonator cavity to give thermal self-compensation, structural stability and improved thermal load distribution. The design and the preliminary lab test results are presented in this paper.

Paper

Title

Page

Simulation of a New Beam Current Monitor Under Heavy Heat Load

151

J.L. Sun, P.-A. Duperrex
PSI, Villigen PSI, Switzerland

Funding: "The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n.°290605 (PSIFELLOW/ COFUND)"
At the Paul Scherrer Institute (PSI), the High Intensity Proton Accelerator (HIPA) feeds a spallation source target with protons. A beam current monitor installed 8 meters downstream from the target is heated by the scattered particles from the target. This thermal load on the monitor causes the resonance frequency to drift much more than expected. A novel new beam current monitor using graphite has been developed. In order to have a good understanding of its performance, the simulation software ANSYS has been used to carry out thermal and high frequency simulations. With this software, it was possible to perform a detailed design of the thermal self-compensation scheme and to check the structural stability of the whole system. In this paper, simulation results are presented to show that frequency and sensitivity drifts can be reduced to 8 kHz from previous 730 kHz when realistic operating conditions are assumed.

MOPAB48

Design of a New Beam Current Monitor Under Heavy Heat Load

154

J.L. Sun, P.-A. Duperrex, G. Kotrle
PSI, Villigen PSI, Switzerland

Funding: The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n.°290605 (PSI-FELLOW/COFUND)
At the Paul Scherrer Institute (PSI), a 590 MeV 50 MHz High Intensity Proton Accelerator (HIPA) has been operated for many years at 2.2 mA / 1.3 MW and it will be soon upgraded to 3 mA / 1.8 MW. A spallation source target is driven from the HIPA. Downstream from this target is a beam current monitor, called MHC5. The thermal load in MHC5 induced by the scattered particles from the target causes the resonance frequency of the current monitor to drift. Even with an active cooling system, the drift remains a problem. A new beam current monitor has been designed to overcome this shortcoming. The mechanical design of the new monitor has been completed and manufacturing will start soon. A novel feature is the use of graphite for the resonator cavity to give thermal self-compensation, structural stability and improved thermal load distribution. The design and the preliminary lab test results are presented in this paper.