Plasma Switch for 11.4 GHz Active Sled-II RF Pulse Compressor

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-02ER83540
Agency Tracking Number: 70518S02-I
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
202008 Yale Station, Suite 100, New Haven, CT, 06520
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jay Hirshfield
 (203) 789-1144
Business Contact
 George Trahan
Title: 70518
Phone: (203) 789-1144
Research Institution
70518 The high pulsed radio frequency (rf) power, needed for a future electron-positron collider such as NLC, will require rf pulse compression, for which a number of approaches are currently under study. Active rf pulse compression can - in principal - provide greater flexibility in compressor design than passive compression, because higher compression ratios can be achieved at higher efficiency. This project will develop a plasma switch for an active SLED-II rf pulse compressor with a compression ratio greater than 8:1 and an efficiency greater than 80%. The plasma switches will be used with resonance structures having a reflection coefficient that can be rapidly shifted during the rf pulse from a klystron. Changing both the reflection coefficient of the switch and the phase of the klystron output will allow high compression ratios with high efficiency. In Phase I, designs will be optimized (at both high and low nitrogen gas pressure in the discharge tubes, and for a variety of X-band resonance structures) in order to couple the rf power from a klystron into a pair of relatively short delay lines and then, upon switching, into an accelerator structure. Low-power cold tests will be conducted on the most promising designs, in order to select the best design for fabrication and high-power testing in Phase II. Commercial Applications and Other Benefits as described by awardee: The rf plasma switches, with reflectivity that can be changed rapidly to produce rf pulse compression greater than 8:1 with efficiency >80%, could be adopted for use in a future electron-positron collider. Thousands of these switches would be required, constituting a potential commercial market of several tens of millions of dollars.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government