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

HINS Front-End R&D---

Status and PlansBob Webber

Fermilab Accelerator Advisory CommitteeAugust 7, 2007

Update of May 10th – 12th, 2006 AAC Presentation

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Bob Webber - HINS R&D Status - August 2006 AAC

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

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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

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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

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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

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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

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Layout Through One SSR β=.4 Cryostat

Ion Source RFQ MEBTRoom 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

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Klystron/Modulator Area shown May 2006

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325 MHz 2.5MW Klystron shown May 2006

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Pulse Transformer shown May 2006

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Waveguide Circulator shown May 2006

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Waveguide Components shown May 2006

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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

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Klystron Success !

From HINS logbook, Wednesday, April 4

Full peak klystron output power at 3.5 msec pulse was achieved the following day

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Toshiba Reps at Klystron Turn-on

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325 MHz RF Component Test Facility

Now Operational and Being Used

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325 MHz Cavity Test Cave

First RT Cavity Ready for Test

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• 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

From: Roger L. Dixon [[email protected]] Sent: Friday, July 27, 2007 1:59 PM To: Bob Webber; Jim Steimel Subject: Request for Approval to Operate RF Cavity in HINS 325 MHz Test Cavity Cave Bob and Jim, The ILCTA ESH Operational Readiness Review Committee has recommended that I approve operating and testing of the Room Temperature Cavities in the HINS Meson 325 MHz Cavity Test cave. You are hereby authorized to operate the system as per the recommendation below. Roger

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RT Linac Support Structures in Meson

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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

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Superconducting Spoke Cavities

• First SC spoke cavity fabrication has been received from Zanon

• Second cavity is currently in fabrication at Roark

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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

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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)

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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)

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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

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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

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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

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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

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Back-up Slides

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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

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Meson Building Floor Plan

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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

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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

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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

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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

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325 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

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325 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

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325 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)

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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

Documents

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