PAC2013 - List of Authors (Chen, A.Z.)

Paper	Title	Page
TUPSM10	The Conceptual Design of PXIE Vacuum System	652
	A.Z. Chen, V.A. Lebedev, A.V. Shemyakin Fermilab, Batavia, USA
	Funding: under Contract No. DE-AC02-07CH11359 with the United States Department of Energy The Project X Injector Experiment (PXIE) will be a prototype of the Project X front end that will be used to validate the design concept and decrease technical risks. It consist of a 30 kV, 5mA H⁻ ion source; LEBT; 2.1 MeV CW RFQ; MEBT that forms a desired bunch structure by removing ~80% of bunches; two SC cryomodules accelerating the beam to ~25 MeV; and a beam dump. The PXIE vacuum system faces significant technical challenges, including a large hydrogen flux from the H⁻ ion source and large outgassing from the LEBT absorber. The greatest challenge is probably to minimize the risk of degrading re-bunching RF cavities and the nearby SC cryomodule due to the migration of large gas load and microparticles from MEBT absorber. Therefore, it is important to apply low particulate vacuum practices in the vicinity of cryomodules for preventing contamination of the SC cryomodules. Differential pumping is also necessary to protect and ensure reliable operation of the beamline. The conceptual design of the vacuum system is presented in this paper.

Paper

Title

Page

The Conceptual Design of PXIE Vacuum System

652

A.Z. Chen, V.A. Lebedev, A.V. Shemyakin
Fermilab, Batavia, USA

Funding: under Contract No. DE-AC02-07CH11359 with the United States Department of Energy
The Project X Injector Experiment (PXIE) will be a prototype of the Project X front end that will be used to validate the design concept and decrease technical risks. It consist of a 30 kV, 5mA H⁻ ion source; LEBT; 2.1 MeV CW RFQ; MEBT that forms a desired bunch structure by removing ~80% of bunches; two SC cryomodules accelerating the beam to ~25 MeV; and a beam dump. The PXIE vacuum system faces significant technical challenges, including a large hydrogen flux from the H⁻ ion source and large outgassing from the LEBT absorber. The greatest challenge is probably to minimize the risk of degrading re-bunching RF cavities and the nearby SC cryomodule due to the migration of large gas load and microparticles from MEBT absorber. Therefore, it is important to apply low particulate vacuum practices in the vicinity of cryomodules for preventing contamination of the SC cryomodules. Differential pumping is also necessary to protect and ensure reliable operation of the beamline. The conceptual design of the vacuum system is presented in this paper.