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Vacuum Predictions and Measurements for an Internal Pellet Target

Inti Lehmann·Orjan Nordhage·Carl-Johan Friden·Gunar Norman·Curt Ekstrom·Tord Johansson·Ulrich Wiedner
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Abstract

Measurements with low Z targets at internal experiments typically imply a gas load which deteriorates the ring vacuum. Future experiments need reliable estimates for the expected vacuum conditions in order to design 4-pi detectors closely surrounding the interaction area. We present a method for the calculation of the resulting vacuum of such a complex system using a Pellet Target. In order to test the method, a vacuum system with diagnostic tools has been set up and a Pellet Target was operated under realistic conditions. The results for the absolute vacuum agree within factors of two with the expected pressures.

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Inti Lehmann, Orjan Nordhage, Carl-Johan Friden, Gunar Norman, Curt Ekstrom, Tord Johansson, Ulrich Wiedner. 2007-01-04. Vacuum Predictions and Measurements for an Internal Pellet Target. https://doi.org/10.1016/j.vacuum.2007.10.005

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