Reviews for High Bandwidth Transverse Feedback LARP: 10.06.2013 LIU: 2x.07.2013 W. Hofle

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Reviews for High Bandwidth Transverse Feedback

LARP: 10.06.2013LIU: 2x.07.2013

W. Hofle

CERN BE-RF-FB

W. Hofle @LIU Meetings 12 June 2013

12.06.2013

June 10, 2013

2W. Hofle @LIU Meetings 12 June 2013

12.06.2013

June 10, 2013

https://indico.fnal.gov/conferenceOtherViews.py?view=standard&confId=6836

Plenary session, CERN view presented by L. Rossi (remotely)

Three parallel sessions

• Magnets• Crab Cavities• Feedback project

Closeout, conclusions by external reviewers (no slides, there will be a report)

Details of external review (Fermilab, one day review) in Indico

LARP external Review 10.06.2013 (1)

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12.06.2013

June 10, 2013

LARP external Review 10.06.2013 (2)

External reviewers for Feedback: D. Teytelman (Dimtel), M. Brennan (BNL)

4W. Hofle @LIU Meetings 12 June 2013June 10, 2013

LARP external Review 10.06.2013 (2)

16.7 MUS$ without CERN contribution, 12.3 MUS$ with CERN contribution

5W. Hofle @LIU Meetings 12 June 2013June 10, 2013

CERN contributions as presented on LARP Budget Proposal

16.7 MUS$ without CERN contribution, 12.3 MUS$ with CERN contribution

• Minimum CERN contribution (4.47 M US$ in US accounting)

• Kicker prototype• Pick-up• Infrastructure and Integration (cabling, interfaces LLRF/software,

vacuum etc.)

• Optional CERN contributions (negotiable)

• Power amplifier, high power components• Spares• Diagnostics, monitoring

• LARP core contribution: Signal processing

June 10, 2013 W. Hofle @LIU Meetings 12 June 2013 6

CERN contributions as presented by W.H.

Accelerator Physics Support: Simulations, integration studies for implementation in SPS (optics, aperture, impedance)

Coordination, interface for potential contributions in Europe (for example kicker hardware from INF – Frascati)

Project fully integrated within LHC Injector Upgrade Project (LIU)

Engineering (FPGA and electronics development)

Pick-up design and construction

Fabrication of final system, vacuum structures, electronics

Integration of components, vacuum testing, tunnel infra-structure, cabling

Integration with Control System

Machine Developments, Commissioning

W. Hofle @LIU Meetings 12 June 2013

Intra-bunch Damping at Work: CERN PS Transverse Feedback

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A. Blas et al. IPAC’13, WEPME011D. Perrelet (CERN BE-RF)

10 ns/div

PS TFB ON

10 ns/div

PS TFB OFF

1.4 GeV 26 GeVChallenge:Time of Flight CompensationFully digital implementation

June 10, 2013

Kicker Location News – Tunnel Space in LSS3

W. Hofle @LIU Meetings 12 June 2013

Short (array of) striplines, slotted wave guides, cavities ?Location: dispersion supressor, flat vacuum chamberFrequency reach < 1.5 GHzCabling / Infra-structure being prepared in LS1 (2013/2014)

June 10, 2013 8

Low attenuation, low dispersion “smooth-wall” coax-cables 7/8”installed in May 2013

W. Hofle @LIU Meetings 12 June 2013 9

Time-Line: SPS Implementation of vertical High Bandwidth Feedback

Year 4Year 3Year 2Year 1 Year 5

Phase 1:

20172014201320122011 2015 2016 2018Year 6 Year 7

demonstrator

power amplifiers for phase 2

tendering (s)

phase 2 beam testsPhase 2:

review forphase 2:

Phase 3: Final implementation

go / no-gophase 3:

June 10, 2013

2019

new pick-up design and construction

kickers design and construction

June 10, 2013 W. Hofle @LIU Meetings 12 June 2013 10

Summary

SPS can profit from High Bandwidth Transverse Feedback in a number of ways: 25 ns and 50 ns upgrade variants (TMCI, ECI), and during scrubbing (scrubbing beam !)

Interest and potential applications in PS and LHC SPS is also a test-bed

CERN committed to upgrade transverse feedbacks and high bandwidth transverse feedback in injectors within LIU Project frame

2012 / 2013 Beam Tests with SLAC developed demonstrator hardware successful: Feedback loop closed with 3.2 GS/s digitization using a single bunch confidence in digital technology

Full exploration of demonstrator with beam requires new hardware be put in place to overcome bandwidth limitations of present kicker down selection of kicker options ongoing, infrastructure put in place for installation of new kickers as early as at end of LS1, power amplifiers

New pick-up design launched at CERN

Full bandwidth tests in SPS between LS1 and LS2 mandatory to propose such a system for LHC as well as the final implementation for the SPS

June 10, 2013 W. Hofle @LIU Meetings 12 June 2013 11

Comments and recommendations from Reviewers

Management structure, put something written in place

Schedule for LS1 critical for kicker installation

Explore synergy with BNL

Kicker impedance and beam induced power study where it goes

Would developed kicker be compatible with PS, LHC ?

Integration with CERN LLRF (synchronisation) and CERN software needs more attention

Manpower adequate or excessive ?

Recommend to switch from evaluation boards in electronics to hardware produced by project team

June 10, 2013 W. Hofle @LIU Meetings 12 June 2013 12

Discussion on 11T Dipole emerged, clarification will be asked from CERN

Time Line shows that decisions points ahead (HL to become fully funded project only in the future under new CERN directions, needs 6.5-7 TeV running results to make decision

In absence of full CERN commitment to HL, need for some interim agreement

Budget in US only clear for 2014, 2015, but 2015 is very difficult

Additional support on top of flat-flat funding can only come from within labs by re-directing resources (man power) to LARP activities, DOE instructed labs to do so

Will accumulate schedule shift if funds are not available in US as asked

Observations by W.H.

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Overview, charge of review (Wolfgang + Brennan)

Beam Parameters overview (Giovanni ? Incl. LHC ?)

Simulations (Kevin)

Optics and Aperture constraints for pick-up and Kicker (Hannes)

PU design and receiver (Gerd Kotzian)

Kicker Design (John Cesaratto)

Kicker and Pickup Fabrication (Eric)

Synchronisations and time of flight compensation (Daniel Valuch)

Technology choices for ADCs/DACs/FPGAs (Tom Levens)

CERN Controls (Andy ?)

SLAC / LARP contributions

INFN – LFN contributions

Close-out, recommendations

CERN Review for Feedback Project: Status of Planning