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Dual Feed RF Gun and Solenoid•Dual Feed/Racetrack Design Corrects RF Fields to Second Order•Solenoid Design Includes Both Dipole and Quadrupole Field Correctors
April 2004: Released Request for Information to two vendorsApril 2004: Begin work on RF design for gunMay 2004: Vendors respond with budgetary quotes and schedules for engineering and fabrication of load lock and RF gun.August 2004: Technical meetings with vendors at SLACNow: Finalize RF designNow: Write Request for Proposal and send to vendors
Recent Decision: Load Lock prototype developed using SBIR with AES (Advanced Energy Systems)
RF Gun Fabrication & Acquisition: Assumptions and Plans
Load Lock prototype developed using SBIR with AES (Advanced Energy Systems)Gun design should be compatible with future load lockSLAC does RF design for gun, provides design to vendorVendor engineers gun including thermal analysis and design of cooling systemVendor cold tests, fabricates and re-tests gunTechnical reviews at both SLAC and Vendor facilitySLAC participates with Vendor in RF and thermal tests of the gun and cooling systemVendor may participate in high power RF commissioning of gun at SLACVendor Delivers:
Hardware/Software:RF guncooling system including plumbing hardware used to test gun & cooling system computer control source code.
Documentation:All engineering drawings funded by this project especially those of gun and cooling systemWritten progress reports on contract progressWritten reports of rf and thermal tests. Reports should include raw data acquired during tests.
Machining, Tuning & Brazing the RF GunUnder-machine rf surfaces ~0.010”Clamp together and perform rf cold tests.Based on rf tests machine surfaces as requiredRe-do rf cold testsIterate rf tests and machining until gun on resonance and balanced.Perform time-domain and frequency-domain measurements of 0- and pi-modes, bead drop, needle pull, etc.Braze gun
Should a lower temperature braze be used to reduce softening of Cu?Use glidcop instead of Cu? (prefer Cu)Minimize number of brazes
Assemble gun with dual feed waveguidePerform time-domain and frequency-domain measurements of 0- and pi-modes, bead drop, needle pull, etc.Install on solenoid. Align rf and magnetic centerlines
Reviewed Load Lock (LL), gun and gun solenoid requirements and constraintsGun design compatible with future LLGun & solenoid designed as a single assembly for easy replacement with future gunS20 Alcove includes a Load Lock Room for cathode developmentBuild prototype LL with SBIR with AES
Present gun fabrication plan:SLAC designs gun RF geometryVendor does thermal & mechanical engineeringVendor fabricates and cold tests gunProgress and technical reviews at SLAC and Vendor facilityVendor delivers gun, documentation
Gun needed by Oct 2006 for installationDescribed machining, tuning & brazing processControl of amplitude & phase between the dual feedsProposed cooling system for gun and dual feed waveguide