Cathode Stalk Cooling System for the MK1 Quarterwave Gun
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Authors
Baxter, Amanda B.
Subjects
TERMS Free Electron Lasers
FEL
Cathode
Photocathode
Cryomodule
Cryogenic
Electron Gun
Superconducting
Quarter-wave Cavity
FEL
Cathode
Photocathode
Cryomodule
Cryogenic
Electron Gun
Superconducting
Quarter-wave Cavity
Advisors
Lewellen, John
Date of Issue
2012-06
Date
12-Jun
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
The free electron laser (FEL) is of great interest to the United States Navy for shipboard use. The Naval Postgraduate School (NPS) Beam Physics Lab has designed and, in cooperation with other organizations, constructed a superconducting 500 MHz quarter-wave gun and photocathode drive laser system. The cathode of the gun is mounted onto a ~60 cm copper stalk assembly that will position and hold the cathode at the nose cone of the gun. This thesis will explore the necessity to cool the cathode stalk assembly that will have approximately 100 W of laser, RF, and radiated heat distributed on it. Based on the operational requirements of the MK I quarter-wave gun, a cooling system was designed to run liquid nitrogen internally through the stalk. Simulations were run on COMSOL to determine the effectiveness of the design, followed by the creation of a test stand to physically assess the cryogenic cooling system. Data was found verifying the applicability of the system. Recommendations are made for future experimentation using the cathode stalk cooling system test stand based on the results of this thesis.
Type
Thesis
Description
Series/Report No
Department
Applied Physics