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Feasibility of a radiation-cooled scraper for PXIE MEBT

Document #:
Project X-doc-1221-v3
Document type:
technical note
Submitted by:
Alexander Shemyakin
Updated by:
Alexander Shemyakin
Document Created:
13 Sep 2013, 08:06
Contents Revised:
08 Dec 2015, 15:55
DB Info Revised:
08 Dec 2015, 15:55
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Other Versions:
Project X-doc-1221-v2
02 Oct 2013, 10:11
Project X-doc-1221-v1
13 Sep 2013, 08:06
The PXIE MEBT will have a system of 16 scrapers for protection and collimation with a desired power rating of ~100W per jaw. This paper suggests an option of a radiation-cooled scraper and analyzes as a possible prototype an electrically isolated, Molybdenum alloy TZM plate. Such a plate was successfully tested at an electron beam test stand with scraping up to 100W from a high-power-density electron beam. The surface temperature of the plate was analyzed from the thermal radiation using a narrow-band red filter and a camera and was found in good agreement with ANSYS simulations. Results of preliminary measurements with a larger-size electron beam are in agreement with TZM emissivity of 0.13.
The preliminary conclusion from these tests and simulations for the PXIE is that the tested design can be used at an operation power rating of ~50W.
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Notes and Changes:
Misplaced Fig. 18a is corrected.
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