HINS Front-End R&D --- Status and Plans Bob Webber Fermilab Accelerator Advisory Committee August 7, 2007 Update of May 10 th – 12 th, 2006 AAC Presentation

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 2 Talk Outline Preview of today’s message Motivation and mission Reminder of R&D objectives Progress report –R&D facilities –Accelerator components Schedule status and outlook Conclusion

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 3 Today’s Message HINS R&D program is still alive Progress continues to be made –325 MHz klystron has been commissioned –First room temperature spoke cavity will be tested with RF power this month –First superconducting spoke cavity is fabricated and being prepared for vertical cryostat test Current status is generally 9-12 months behind schedule presented to the AAC 15 months ago in May 2006 Current level of manpower resources and anticipated ~$2M M&S budget in FY08 will lead to further delays

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 4 HINS Motivation and Mission Motivation – –To demonstrate key and un-tested technologies important to the low-energy front-end section of the proposed 8 GeV H- Linac Mission, unchanged from ~2 years ago – –To accomplish the R&D necessary to establish technical credibility and cost basis for the Linac front-end by ~2010

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 5 HINS R&D Objectives Demonstrate high power RF distribution and 4.5 msec pulse operation of multiple cavities from a single klystron Demonstrate performance of 325 MHz high power vector (IQM) modulators for amplitude and phase control of multiple cavities Measure axially-symmetric beam performance with room- temperature crossbar spoke resonator cavities and SC solenoid focusing in the RT Linac Demonstrate beam acceleration at energies above 10 MeV using superconducting spoke resonator RF structures Demonstrate high-speed (nanosecond) beam chopping at 2.5 MeV Demonstrate performance of this Linac design concept and the resulting beam quality to 60 MeV This all adds up to building a one-of-a-kind superconducting 60 MeV H- linac

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 6 HINS Floor Plan in Meson Detector Building RF Component Test Facility Ion Source and RFQ Area 150 ft. Cavity Test Cave 60 MeV Linac Cave Klystron and Modulator Area Existing CC2 Cave ILC HTC Cave Since May 2006, Linac has been moved downstream to accommodate continued use of CC2 Cave

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 7 Layout Through One SSR β=.4 Cryostat Ion SourceRFQMEBTRoom Temperature 16-Cavity, 16 SC Solenoid Section One Β=0.4 SSR 11-Cavity, 6-Solenoid Cryostat Two Β=0.2 SSR 9-Cavity, 9-Solenoid Cryostats 2.5 MeV50 KeV 10 MeV 20 MeV 60 MeV 30 MeV

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 8 Klystron/Modulator Area shown May 2006

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC MHz 2.5MW Klystron shown May 2006

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 10 Pulse Transformer shown May 2006

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 11 Waveguide Circulator shown May 2006

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 12 Waveguide Components shown May 2006

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 13 Modulator and Pulse Transformer Modulator Signals at 5.6 KV into Resistive Load February 2, 2007 Modulator Output Current 200A/div Bouncer Voltage Capacitor Bank Voltage at 5.6 KV Pulse Transformer Output Current 2A/div at 36A

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 14 Klystron Success ! From HINS logbook, Wednesday, April 4 Full peak klystron output power at 3.5 msec pulse was achieved the following day

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 15 Toshiba Reps at Klystron Turn-on

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC MHz RF Component Test Facility Now Operational and Being Used

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC MHz Cavity Test Cave First RT Cavity Ready for Test

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 18 Approval received July 27 for RF power testing of first room temperature cavity in test cave Recently recovered from modulator charging supply problem, cavity test has begun this week Approval to Commence Cavity Testing

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 19 RT Linac Support Structures in Meson

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 20 Ion Source, RFQ and Beyond Proton source has been operational in MS6 and currently is undergoing modifications to improve high voltage power system and voltage stand- off capability MEBT chopper pulser prototyping is underway MEBT buncher cavity design is complete and fabrication bids are coming in RFQ delivery is now expected ~October 2007 RT cavities #2-4 are being machined RT SC solenoid+trim magnet design and prototyping is complete; ready for procurement

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 21 Superconducting Spoke Cavities First SC spoke cavity fabrication has been received from Zanon Second cavity is currently in fabrication at Roark

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 22 Superconducting Spoke Cavities Test cryostat for full pulsed power testing –High fabrication bids prompted new direction in design –Engineers were re-directed to fix LHC magnet failure –Drawings for cryostat vacuum vessel are now complete Plans are proceeding for full voltage CW test of first spoke cavity in the recently commissioned ILC Vertical Test Stand –Mechanical components are designed and mostly on hand –1.3 GHz  325 MHz frequency converters are designed and being assembled to take full advantage of the existing VTS control and data acquisition systems –200 watt CW 325 MHz amplifier has been spec’d and requisitioned Cavity will be BCP’ed at Argonne ~ 2 weeks prior to test anticipated in October

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 23 Meson Schedule 2006 (from 5/2006 updated 8/2007 and assuming present resources) Short “mock” Linac cave section available –May 2006 available, but nothing yet installed (no people) Klystron modulator completion –July 2006 first pulsed in February 2, 2007 (AD EE priorities) 325 MHz RF power system commissioning –July 2006 completed April 4, 2007 (modulator delay) 325 MHz component testing in RF test area –Starting August 2006 began in May 2007 (modulator delay) 325 MHz RT cavity power testing –September 2006 began this week, August 2007 (rad safety issue) Superconducting cavity test cryostat installation –October 2006 sometime 2008 ($$$ and engineer reassignment)

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 24 Meson Schedule 2007 (from 5/2006 updated 8/2007 and assuming present resources) Ion Source installation in Meson –November 2006 October 2007 (RFQ delays) RFQ delivery and power testing –January 2007 delivery expected ~October 2007 (vendor delays) 2.5 MeV beam tests –Beginning February 2007 by end of 2007 (RFQ and manpower) First SC spoke resonator power tests in test cryostat –April 2007 sometime 2008 ($$$ and cryo engineering) Demonstration of multiple cavity RF distribution and independent amplitude & phase control –July 2007 sometime 2008 ($$$, cavity delivery, and LLRF engineering)

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 25 Manpower Resources are Finite and Small HINS is now on third AD mechanical engineering liaison in 18 months and he’s planning to retire around this year’s end Key TD engineers were called to design fixes for LHC triplet magnet problem Cryogenics engineering resources are in high demand from all corners; HINS priority is low Key technical systems now ( still, since May 2006 ) lacking required attention –RF power distribution system (tightly coupled with cavity design status and power requirements) –Low level RF systems – system design, modeling, hardware –Cryogenics delivery system engineering for the Meson Linac cave –Beam instrumentation systems

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 26 Critical FY08 Needs To stop budget erosion –~$5M M&S budget in FY06 (2.8 FNAL, 2.2 collaborating Labs) –~$3M guidance in FY07 reduced to ~$2M –~$2M anticipated for FY08 Cryostat for pulsed SC spoke cavity testing –Cryostat design and procurement Dedicated mechanical and cryo engineering with drafting support (1 FTE eng., 1 FTE drafting) –Cryogenics installation in test cave Dedicated cryo engineering and installation techs (0.25 FTE eng., 0.5 FTE tech) –$350K M&S SC solenoid/cavity/cryostat design and prototyping –Cavity fast tuner design and prototyping Mechanical engineer with controls and tech support (1 FTE eng., 0.5 FTE tech) –Beam line cryostat design Cryo/mechanical engineer and drafting support (0.3 FTE eng., 0.4 FTE tech) –Focusing solenoid design and prototype Magnet designer and drafting support (0.3 FTE eng., 0.4 FTE tech/drafting) RT solenoid helium vessel and lead design and partial procurement (0.25 FTE eng., 0.4 FTE tech/drafting) –$300K M&S

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 27 Critical FY08 Needs Cavity control, beam loading simulation, and LLRF system design –Simulation Dedicated accel physicist or engineer (1 FTE) –LLRF system design and prototype implementation Dedicated LLRF engineer with tech support (1 FTE eng., 0.75 FTE tech) –$100K M&S High power RF distribution design –Design for 60 MeV linac Dedicated RF engineer (0.5 FTE) –Procurement for room temp section and one cryostat –$250K M&S Procure spare klystron at risk of 1 year program delay –$500K M&S SC spoke cavity/cryomodule/drive coupler procurement –Begin progurement of one full cryomodule minimum Dedicated mechanical and cryo engineering with drafting support (1 FTE eng., 1 FTE drafting) –$850K M&S Support equipment, installation, and utilities –$150K M&S

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 28 Summary HINS R&D program is still alive Progress continues to be made –325 MHz klystron has been commissioned –First room temperature spoke cavity will be tested with RF power this month –First superconducting spoke cavity is fabricated and being prepared for vertical cryostat test Current status is generally 9-12 months behind schedule presented 15 months ago to the AAC in May 2006 –Expect full voltage test of first superconducting spoke cavity in ILC-VTS this year –Hope for 2.5 MeV beam by end of 2007 Critical manpower and larger than anticipated FY08 budget needed to minimize further delays

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 29 Back-up Slides

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 30 From May 2006 AAC Report The plan has a number of challenges, requires development of several technologies, and many of the components are at the frontier of R&D in this field. The overall schedule seems to be ambitious but manageable, and the committee supports the plan, with the recommendation that a detailed schedule with milestones and deliverables be developed. In addition, the committee recommends that –sufficient diagnostics be included in the test facility to fully verify success as well as understand unexpected results –detailed simulations be performed to verify the vector modulator specifications and performance

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 31 Meson Building Floor Plan

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 32 Meson Building Floor Plan 90 MeV Linac Klystron and Modulator Area RF Component Test Facility Cavity Test Cave 200 ft. Ion Source and RFQ Area

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 33 R&D Plan Install and commission 2.5 MW, 325 MHz klystron system Equip and operate a 325 MHz high power RF component test facility and cavity test cave Fabricate, install, and operate a test cryostat for 325 MHz SC spoke cavities Assemble the 10 MeV RT Linac, operate with beam, and verify performance Install 325 MHz SC spoke resonator cryomodules and operate with beam to 60 MeV This all adds up to building a one-of-a-kind superconducting 60 MeV H- linac

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 34 Linac and Absorber Enclosure Equipment –Accelerating cavities, RF power distribution, other beam line components, and all utilities and support equipment required to accelerate protons or H- ions to 90 MeV –Beam absorber Activities –Commission and operate 90 MeV beam at maximum ~10KW intermittent beam power

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 35 Major Activity Areas in Meson 325 MHz Klystron and Modulator Area 325 MHz RF Component Test Facility Cavity Test Cave (RT-CH and superconducting cavities) Ion Source, RFQ, and 2.5 MeV Absorber Area 60 MeV Accelerator and Beam Absorber Cave

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC MHz Klystron and Modulator Area Equipment –Modulator –Klystron –Waveguide, circulator, power divider, waveguide switch and RF load –Low level electronics Activities –Commission and operate klystron power system

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC MHz RF Component Test Facility Equipment –Waveguide with shuttered component test interface –DC/pulsed medium power supplies –Low level and diagnostics electronics Activities –Installation and testing of various 325 MHz RF components over a wide range of RF power levels

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC MHz Cavity Test Cave Equipment –Facilities for power testing of room temperature and superconducting RF cavities –Cavity test cryostat –Vacuum equipment –Low level and diagnostics electronics Activities –Install and test various 325 MHz RF cavities (RT-CH and superconducting) up to full power (~100KW maximum pulsed)

Fermilab Bob Webber - HINS R&D Status - August 2006 AAC 39 Summary Considerable activity is now underway on component design, procurement, and facilities to support planned R&D It will be an exciting next 12 months to bring 325 MHz klystron and RFQ on-line and to accelerate beam in the Meson Building Key areas, presently lacking effort necessary to maintaining desired schedule, have been identified