Download - LARP Accelerator Systems Status Plans 19 June 2008 DOE Review, LBNL Tom Markiewicz/SLAC BNL - FNAL- LBNL - SLAC US LHC Accelerator Research Program

LARP Accelerator Systems Status & Plans

19 June 2008DOE Review, LBNL

Tom Markiewicz/SLAC

BNL - FNAL- LBNL - SLACUS LHC Accelerator Research Program

LARP DOE Review - 19 June 2008 Acc.Systems Status - T. MarkiewiczSlide n° 2 / 26

Overview

• By its nature Accelerator Systems encompasses a broad spectrum of projects and lacks the focus of the LARP magnet program

• The only unifying theme is “enhanced LHC luminosity, sooner” • Credit accrues to LARP insofar as we efficiently transfer novel US

designs (fabricated by CERN) or deliver actual hardware (hard deliverables) or provide quality personnel to commission hardware or the beam or deliver to LAUC


Instrumentation – “Ending” Tasks

Can only be considered a success

By end of FY07, collaboration on– Tune & Coupling feedback– Schottky Monitor– AC Dipole

resulted in installed hardware.

In FY08 LARP provided modest support for testing, improvements, software interfaces and commissioning.

In FY09 these tasks may be ended and activity advanced to ‘Beam Commissioning’ although proponents would generally prefer to see “line item” commissioning support


Instrumentation – “Continuing” Tasks

In FY08 and earlier, major support was provided to– Luminosity Monitor

As this is/will be the first LARP produced hardware installed in LHC

Recent letter from CERN luminosity monitoring group leader raises concern that a CERN-identified “Hard Deliverable” will be late

Response:1. Install remaining 2 of 4 detectors, readout boards and cables before

FY08 beam (August?)2. Major LARP support in FY09, before CY2009 run (April?), to fully

complete the system (firmware, software & integration)3. Commissioning support during the CY2009 run (deconvolution,

crossing angle, luminosity optimization)4. Detailed schedule by Task Leader & weekly meetings or reports5. Follow-up by LARP management


Instrumentation – “New” Tasks

Common architecture of LHC and PEP-II LLRF systems and visits of SLAC LLRF team convinces CERN to strongly support a new LLRF Instrumentation task in FY09

Program:• Adaptation & application of PEP-II configuration and analysis tools to

LHC LLRF systemFuture:• IndefiniteCost:• FY08: Travel as a “Beam Commissioning Activity”, ~$35k• FY09: Travel as a fully approved task• Labor provided by SLAC base program, subject to DOE approval


Collimation – Ending Tasks

By end of FY07– RHIC Benchmarking of SIXTRACK– MARS-based study of tertiary collimators– Irradiation study of Carbon & Glidcop collimator materials

resulted in presentations & publications

While each of these STUDIES nominally finished, each could have gone on indefinitely but were stooped to create funds for new tasks


Collimation-Continuing Tasks

Rotatable Collimator Program– Major support ($950k) in FY2008 to Rotatable Collimator program– Looks on-track to ship ‘deliverable’ to CERN mid-2009

• Similar level of support required for FY2009• Management oversight?

– Possible LAUC project depending on CERN prototypes & beam test success• CERN plan to be discussed tomorrow

Crystal Collimation experiment at Tevatron– “High Risk, High Gain”– Challenge to turn experiment from Tevatron-unique to generically

applicable science


Collimation-New Tasks

Crystal Collimation experiment at SPS– Sub-task of “Crystal Collimation”– Synergy with Tevatron

• same people• shared hardware,

– Low cost $200k + common fund + travel + (salary time?)– Limited duration: over by end 2009– Designed for single-particle dynamics study and knowledge that

could be applicable to LHC


Accelerator Physics-Ending & Continuing Tasks

None Ending– Very little interest by CERN for continued “academic” studies– Reminder, existing tasks are

• Ecloud• Beam-Beam-general• Beam-Beam & Wire compensation• E-lens• Crab Cavity

– Minor: Rama Calaga as Toohig fellow provides horsepower

However…– we are trying to package & redirect open-ended simulation

“studies” towards specific hardware for LHC


Accelerator Physics-New Tasks &/or WBS Structure

Ecloud– Simulation– Ecloud control in SPS through RF Feedback– Ecloud control in SPS through Grooved Chambers

Beam-Beam– Simulation– Wire compensation– E-lens

Crab Cavity– Minor: Rama Calaga as Toohig fellow provides horsepower– requesting major increase from $25k to $700k “Blue Sky”

New Initiatives– CRYSTAL at SPS in FY08

PS2 Studies– Strong CERN interest that LARP participate in Injector “white paper” studies– Uli Wienands (SLAC) assembling a multi-lab proposal


Proposed US LARP Accelerator System Tasks in FY09

BNL FNAL LBNL SLAC Total BNL FNAL LBNL SLAC Total BNL FNAL LBNL SLAC Total1 Accelerator Systems 380 490 1,068 1,125 3,063 620 492 1,309 830 3,251 722 618 1,564 1,328 4,232 1.1 Instrumentation Ratti 115 60 868 0 1043 315 222 1109 0 1646 240 218 1364 0 18221.1.1 Phase I 115 60 868 0 1043 315 222 1109 0 1646 240 218 1364 0 18221.1.1.1 Chromaticity Feedback Cameron 75 25 100 250 60 310 - 0 0 0 01.1.1.2 Luminosity Monitor Ratti 868 868 25 1109 1134 0 0 1364 0 13641.1.1.4 Schottky Jansson 15 15 122 122 0 98 0 0 981.1.1.5 AC Dipole Kopp 40 20 60 40 40 80 40 40 0 0 801.1.1.6 LLRF Fox 0 0 200 80 0 0 280

1.3 Collimation Markiewicz 50 100 0 950 1100 135 15 0 800 950 262 200 0 1223 16851.3.1 Phase I 0 0 0 0 0 50 0 0 0 50 0 0 0 0 01.3.1.1 Cleaning Efficiency Study Drees 0 0 50 501.3.2 Phase II 50 100 0 950 1100 85 15 0 800 900 262 200 0 1223 16851.3.2.1 Rotatable Collimators Markiewicz 950 950 800 800 0 0 0 1196 11961.3.2.2 Tertiary Collimation Study Mokhov 0 15 15 0 0 0 0 01.3.2.2 Crystal Collimation Peggs 50 100 150 0 22 200 0 27 249

T980 MokhovCRYSTAL at SPS Peggs

1.3.2.3 Irradiation Studies Simos 0 85 85 240 0 0 0 240

1.4 Accelerator Physics Fischer 215 330 200 175 920 170 255 200 30 655 220 200 200 105 725 1.4.1 Studies 215 330 200 175 920 170 255 200 30 655 220 200 200 105 725 1.4.1.1 Electron cloud Pivi 75 - 160 - 235 70 - 150 - 220 75 160 235

Simulations FurmanEcloud FB at SPS FoxGrooved Chambers Pivi

Beam-beam1.4.1.2 Simulation Sen - 120 40 40 200 - 190 50 30 270 - 120 40 40 200 1.4.1.3 Wire Beam-Beam compensation Fischer 50 - - - 50 100 50 - - 150 50 - 50 1.4.1.5 Electrons lens Shiltsev 45 80 - 40 165 - - - - - 45 80 - 40 165 1.4.1.4 New initiatives feasibility studies Markiewicz 20 130 - 95 245 - 15 - - 15 - - 25 25 1.4.1.6 Crab cavities Calaga 25 - - - 25 - - - - - 25 - - 25 1.4.1.6 PS2 Studies Wienands - - - - - - - - - 25 - - 25

FY 2007FY 2008 FY 2008-Blue Sky


FY09: First Cut

All LARP 3,215 3,372 3,894 1,805 12,286 3,040 3,277 3,882 1,405 11,604 sums without contingency distributedAccelerator Systems+ New Initiatives + Beam Commissioning

555 625 1,120 1,565 3,865 380 530 1,108 1,165 3,183

LARP FY08 budget version v2d – 5/16/08

12,600 11,918 2,791 2,908 4,403 898 #####

BNL FNAL LBNL SLAC Total BNL FNAL LBNL SLAC Total BNL FNAL LBNL SLAC Total1 Accelerator Systems 465 535 920 1,475 3,395 380 490 1,068 1,125 3,063 620 492 1,309 830 3,251 1.1 Instrumentation Ratti 40 0 500 40 580 115 60 868 0 1043 315 222 1109 0 16461.1.1 Phase I 40 0 500 40 580 115 60 868 0 1043 315 222 1109 0 16461.1.1.1 Chromaticity Feedback Cameron 0 75 25 100 250 60 3101.1.1.2 Luminosity Monitor Ratti 500 500 868 868 25 1109 11341.1.1.4 Schottky Jansson 0 15 15 122 1221.1.1.5 AC Dipole Kopp 40 40 40 20 60 40 40 801.1.1.6 LLRF Fox 40 40 0 0

1.3 Collimation Markiewicz 75 125 0 975 1175 50 100 0 950 1100 135 15 0 800 9501.3.1 Phase I 0 0 0 0 0 0 0 0 0 0 50 0 0 0 501.3.1.1 Cleaning Efficiency Study Drees 0 0 0 0 50 501.3.2 Phase II 75 125 0 975 1175 50 100 0 950 1100 85 15 0 800 9001.3.2.1 Rotatable Collimators Markiewicz 950 950 950 950 800 8001.3.2.2 Tertiary Collimation Study Mokhov 0 0 15 151.3.2.2 Crystal Collimation Peggs 50 100 150 0

T980 Mokhov 50 100 150CRYSTAL at SPS Peggs 25 25 25 75

1.3.2.3 Irradiation Studies Simos 0 0 85 85

1.4 Accelerator Physics Fischer 350 410 420 460 1,640 215 330 200 175 920 170 255 200 30 655 1.4.1 Studies 350 410 420 460 1,640 215 330 200 175 920 170 255 200 30 655 1.4.1.1 Electron cloud Pivi - - 190 100 290 75 - 160 - 235 70 - 150 - 220

Simulations Furman - - 140 - 140 Ecloud FB at SPS Fox 50 50 100 Grooved Chambers Pivi 50 50

Beam-beam 100 200 40 80 420 1.4.1.2 Simulation Sen - 120 40 40 200 - 120 40 40 200 - 190 50 30 270 1.4.1.3 Wire Beam-Beam compensation Fischer 50 - - - 50 50 - - - 50 100 50 - - 150 1.4.1.5 Electrons lens Shiltsev 50 80 - 40 170 45 80 - 40 165 - - - - - 1.4.1.4 New initiatives feasibility studies Markiewicz - 20 130 - 95 245 - 15 - - 15 1.4.1.6 Crab cavities Calaga 200 160 140 200 700 25 - - - 25 - - - - - 1.4.1.6 PS2 Studies Wienands 50 50 50 80 230 - - - - - - - - -

3 Program Management 1167 699 656 330 2852 1077 649 496 280 2502 858 722 538 68 21863.1 Administration 957 389 486 290 2122 907 339 436 240 1922 810 373 393 50 16263.1.1 Systems 957 389 486 290 2122 907 339 436 240 1922 810 373 393 50 16263.1.1.1 Accelerator Systems Markiewicz 259 0 63 195 517 259 0 63 195 517 270 60 60 20 4103.1.1.2 Magnet Systems Kerby/Wanderer 333 214 88 0 635 333 214 88 0 635 207 200 110 5173.1.1.3 Programatic Travel Peggs 95 125 115 45 380 95 125 115 45 380 113 113 113 30 3693.1.1.4 Toohig Fellowship Peggs 220 0 170 0 390 220 0 170 0 390 220 110 330

New Initiatives Markiewicz 50 50 50 50 200

3.2 Commissioning Lamm 90 110 150 40 390 50 110 40 40 240 48 349 145 18 5603.2.1 Phase I 40 60 150 40 290 0 60 40 40 140 48 349 145 18 5603.2.1.1 Beam Commissioning Harms 40 40 150 40 270 0 40 40 40 120 18 156 0 18 192

Chromaticity/Tune FeedbackSchottkyLuminosity Monitor (Mathis&Ratti:0.5FTE) 150Instrumentation CommissioningUnspecified 40 40 40

3.2.1.2 IR & Hardware Commissioning Lamm 0 20 0 0 20 0 20 0 0 20 30 193 145 0 3683.2.2 Phase 2 50 50 0 0 100 50 50 0 0 100 03.2.2.1 Long Term Visitor Limon 50 50 0 0 100 50 50 0 0 100 0

FY 2007FY 2008FY 2009


New Initiatives Discussed at CM#10-April 2008 BNL

The initiatives discussed were:– LLRF Studies at LHC– Control of Ecloud Instability in the SPS with Transverse RF Damping– SPS Ecloud Remediation via Grooved and Coated Vacuum Chambers – The CRYSTAL collimation test at SPS – An Optical Diffraction Monitor for LHC – Coherent Electron Cooling for LHC – Collimation Studies at LBNL’s HCX facility – Studies of Intensity Dependent Performance Limits to the LHC Injector

Chain– PS2 Studies– Instrumentation Commissioning Proposal– The use of PEP-II “Model Independent Analysis” at LHC– The use of PEP-II “Phase Advance Analysis” at LHC


LARP ASAC MeetingsBruning, Fischer, Markiewicz, Peggs, Ratti

Initiatives were graded on the following topics with the first three being considered the most important factors. The CERN point of contact canvassed the relevant parties at CERN to gauge CERN interest and committee consensus was reached on the other topics based on CM#10 presentations and supporting documentation.– Impact on LHC luminosity enhancement– Level of interest by CERN– State of art use of physics or technology– Level of institutional collaboration – Time scale– Average yearly cost– University Involvement– Relevance to the US Program– Whether or not the program would be done in any event without LARP

funds– Level of CERN resources contributed to the program– Level of non-LARP US resources contributed to the program– Definite end of program with clear definition of deliverable or result


NI Decisions for Spring 2008

While the level of support LARP can provide is not yet definite and in most cases less than that requested by the proponents, the LARP ASAC has agreed to:– Create a LLRF Studies task under Instrumentation– Expand the scope of the existing “Electron Cloud” task to include

• Ecloud Simulations• SPS Ecloud Feedback• SPS Ecloud vacuum chamber study

– Support the CRYSTAL collimation experiment at the SPS as part of the existing Crystal Collimation task

– Create a new “PS2 Studies” task under Accelerator Physics whose scope still needs more definition but which will include the proposed intensity limitation to the LHC injector chain performance


Tabled or Rejected Initiatives

It was agreed that LARP did not have the resources to fund at this time– An Optical Diffraction Monitor for LHC – Coherent Electron Cooling for LHC – Collimation Studies at LBNL’s HCX facility

It is our understanding that the proposal to contribute to LHC instrumentation commissioning (Synchrotron Light Monitor system, Beam loss Monitor system and Luminosity Monitor) will be funded through LARP’s Long Term Visitor program coupled with salary support from the proponent’s home institution.

We suggest that the MIA and Phase Analysis proponents develop similar support at CERN for their studies and/or come to an agreement with the task leader of the continuing AC Dipole task of how to incorporate their studies into that program in at an affordable level.


Other AS Project Management Decisions

1. Increase (was $25k in FY08) “New Initiatives” category at beginning of new fiscal year• synonymous with “contingency” or “uncommitted funds”• move from Accelerator Systems to “Project Management”• held by Project manager at DOE, not lab were Task Manager lives

2. At Fall CM, beginning 2009, entertain proposals for “seed money” for new initiatives from this pot• added as “New Initiatives” (as CRYSTAL at SPS in FY08)• in Spring, as for task sheet & oral report & judge for inclusion in new

FY


Suggestions for Non-Accelerator Systems Procedures

1. Beam Commissioning– becoming & will become more important as time progresses– in FY08, with cooperation of Elvin Harms, began a “proposal driven”

competition for Beam Commissioning funds• Funded SLAC & LBNL SPS Ecloud FB and SLAC LLRF pre-tasks

– essentially another pot of “New Initiative” money• Less clear to me what it funded at FNAL; BNL did not propose

– In FY09 need to consider• distribution via lab proposals (as in FY’08)• distribution via “finished” tasks (Schottky, AC Dipole, LumMonitor, etc.)

2. Programmatic Travel– as large/larger than “Beam Commissioning”– currently treated as an entitlement (imho)– suggest a “by-name, by-place, by-duration” scheme be developed to make

this as well more “proposal driven”– admittedly difficult to do this well given uncertainties 1 year in advance


Example of Travel Planning Submitted to Harms$42,807

Beam and Hardware Commissioning

FYTrip Number

Name_Last Name First Project Name Location Date

DepartDate

Return Nights Days Total

2008 1 Van Winkle Dan LHC LLRF Study CERN 3/17/2008 3/27/2008 9 11 $4,073

2008 2 Wittmer Walter Phase-advance measurement & analysis: explore possibilitiesCERN 3/13/2008 3/19/2008 6 7 $1,686

2008 3 Van Winkle Dan LHC LLRF Study CERN 6/16/2008 7/3/2008 16 18 $5,9112008 4 Rivetta Claudio LHC LLRF Study CERN 6/22/2008 6/29/2008 6 8 $3,781

2008 5 Mastorides Themis LHC LLRF Study CERN 9/8/2008 9/15/2008 6 8 $1,5092008 6 Rivetta Claudio LHC LLRF Study CERN 9/1/2008 9/15/2008 13 15 $5,591

2008 7 Fox John SPS Ecloud CERN 8/6/2008 8/15/2008 8 10 $5,130

2008 8 Fox John SPS Ecloud CERN 9/13/2008 9/21/2008 7 9 $4,881

2008 9 Van Winkle Dan LHC LLRF Study CERN 9/1/2008 9/8/2008 6 8 $3,781Beam and Hardware Commissioning Requiring BEAM in LHC

2008 3 Fisher Alan Instrumentation CommissioningCERN 9/1/2008 9/21/2008 19 21 $6,465

"Programmatic" Travel $27,148 FY

Trip Number

Name_Last Name First Project Name Location Date

DepartDate

Return Nights Days Total

2008 1 Markiewicz Thomas CERN Beam'07 CERN 9/29/2007 10/6/2007 6 8 $3,4642008 2 Markiewicz Thomas DOE & Crystal CollimationDC & FNAL 12/4/2007 12/7/2007 3 4 $1,4942008 3 Markiewicz Thomas LHC-CC08 BNL 2/24/2008 2/27/2008 3 4 $1,2652008 4 Seryi Andrei LHC-CC08 BNL 2/24/2008 2/27/2008 3 4 $9842008 5 Li Zenhai LHC-CC08 BNL 2/24/2008 2/27/2008 3 4 $973

2008 6 Markiewicz Thomas LARP CM #10 BNL 4/14/2008 4/18/2008 4 5 $2,0422008 7 Smith Jeff LARP CM #10 BNL 4/14/2008 4/18/2008 4 5 $2,0422008 8 Kabel Andreas LARP CM #10 BNL 4/14/2008 4/18/2008 4 5 $2,0422008 9 Seryi Andrei LARP CM #10 BNL 4/14/2008 4/18/2008 4 5 $2,0422008 10 Fox John LARP CM #10 BNL 4/14/2008 4/18/2008 4 5 $2,042

2008 11 Wienands Uli CERN PS2 Review CERN 5/26/2008 5/29/2008 2 4 $1,509

2008 12 Markiewicz Thomas LARP DOE Review BNL 6/5/2008 6/7/2008 2 3 $1,363

2008 13 Smith Jeff EPAC'08 Genoa 6/21/2008 6/28/2008 6 8 $5,5032008 14 Smith Jeff Tracking Lessons CERN 8/23/2008 10/5/2008 42 44 $2,414

2008 15 Markiewicz Thomas LARPAC FNAL 9/4/2008 9/6/2008 2 3 $1,434


LHC Accelerator R&D at SLAC

Proposals for LHC Work at SLACLLRF (PEP-II) Commissioning at LHCLLRF (PEP-II) Studies at LHCElectron cloud instability control at SPS through LLRF (w/LBL)Model Independent Analysis (PEP-II) applied to LHC OpticsImpedance and Stability at LHCLHC Remote Monitoring @ SLACInstrument Commissioning (SLM, BLMs and Luminosity Feedback)Phase Advance Data Analysis (PEP-II)Study of Beam-Beam Limit in Hadron MachinesCrab Cavity Parameters and Design (ILC)Electron Cloud Suppression through Vacuum Chamber Design (ILC)

Discussions underway of which of these proposed R&D activities to pursue and how to fund them

Basic FY08 Model: SLAC Salary support w/ LARP Travel

LARP Funded Work at SLACRotatable CollimatorsBeam-Beam SimulationsSimulations in support of Electron lens


SLAC Account Numbers for LARP Work: FY08½ Fiscal Year for SLAC ~ 1.6M$/year

CAM LARP WBS LARP Task Name SLAC

ParentSLAC

Account #FY08-

k$Budget

RefMarkiewicz 1.3.2.1 Rotatable Collimators 136001 1110930 950 LARP-v1bMarkiewicz 1.3.2.2 Crystal Collimation 136001 N/A 0 LARP-v1b

Markiewicz 1.4.1.2 Beam-beam simulation 136001 1111039 40 LARP-v1bMarkiewicz 1.4.1.4 New initiatives feasibility studies 136001 N/A 25 LARP-v1bMarkiewicz 1.4.1.5 Electrons lens 136001 1111039 40 LARP-v1b

Markiewicz 3.1.1.1 Accelerator Systems Mgmt 136001 1111071 145 LARP-v1bMarkiewicz 3.1.1.3 Programatic Travel 136001 1111007 45 LARP-v1bMarkiewicz 3.2.1.1 Beam Commissioning 136001 1111040 30 LARP-v1b

1275

Fox 1.4.1.4 LHC Feedback and LLRF 136003 1111145 ? ARD-v01Pivi 1.4.1.1 LHC Ecloud Studies 136003 1111146 ? ARD-v01Markiewicz 3.2.1.1 LHC Beam Commissioning 136003 1111147 ? ARD-v01Seryi 1.4.1.6 LHC Crab Cavity 136003 1111148 ? ARD-v01Seryi 1.3.2.2 Crystal Collimation 136003 1111149 ? ARD-v01

800


SLAC # People ProjectLHC Feedback and LLRF

John Fox , Claudio Rivetta, Themis Mastorides, Dan van Winkle

Adapt PEP-II LLRF Tools to LHC & Use for System Configuration, Study & Improvement

John Fox, Jiajing Xu Studies of Transverse RF to control Electron Cloud Instabilities in the SPS

LHC Ecloud Studies

Mauro Pivi, Lanfa Wang Ecloud Remediation via Grooved & Coated Vacuum Chambers

LHC Beam Commissioning

Yiton Yan Use PEP-II Model Independent Analysis to Measure, Model & Correct LHC Optics

Alan Fisher, Uli Wienands Instrumentation Commissioning: Synchrotron Light Monitors, Bunch Loss Monitors, Lum Monitor Feedback

Walter Wittmer Adaptation of PEP-II Phase Advance Analysis to LHC

LHC Crab Cavity Andrei Seryi, Cho Ng, Zenghai Li, Liling Xiao

Crab Cavity Studies

Crystal Collimation Andrei Seryi, Tom Markiewicz, Shilun Pei, Jeff Smith, Lew Keller, Gennady Stupakov, Alex Chao

Crystal Collimation experiments at SPS and Tevatron

SLAC “New Initiatives”FY08 Travel Funded by

LARP Beam Commissioning or Programmatic TravelFY08 Labor Funded by SLAC


Beyond My Pay Grade

With death of US Program at the energy frontier, there are a lot of US Accelerator physicists looking for interesting topics

LARP has the topics but not the moneyStrongly supported by P5 recommendationsI know that this has been discussed in Germantown

Personally I like the model where the DOE core program supports the physicists (labor) and LARP supports the program (engineering, shop, M&S, travel).

Difference between FNAL/SLAC and BNL/LBNL core programsWork for hire model of temporary LARP support needs discussion

Quite challenging managing LHC Accelerator R&D in labs and via LARP


Inter-Task Connectivity Within LARP is Good & Getting Better

Electron Cloud– SLAC-LBNL Simulation– SPS work on grooved chambers (SLAC)– SPS LLRF feedback proposals (SLAC/LBNL)

Beam-Beam– Simulations (FNAL/LBNL/SLAC)– Wires (BNL)– E-lens (FNAL)

Luminosity Monitor (LBNL) and Luminosity FB (SLAC)Crab Cavity System Design (ALL LARP labs + RAL, JLAB, CERN, KEK)Phase II Collimation (SLAC/CERN)Crystal Collimation (BNL/FNAL/SLAC + RD22 collaboration)AC Dipole (UT Austin) and Proposed Machine Studies (SLAC)


FY09 Challenges in Accelerator Systems

Deliver Luminosity Monitor and end taskDeliver RC Prototype and end taskLaunch Crab Cavity with correct level of effort ($), matching CERNCraft and launch PS2 programWork effectively with CERN on collimation component of LAUCForm true crystal collimation team. Do NOT allow:

– Tevatron T980: FNAL + ‘hangers on’– SPS Crystal: Europeans + ‘hangers on’


Possible LARP PS2 PackagesDRAFT!! Under Active Discussion

PS2 Package 1: Tracking, nonlinearities, space charge, halos, H– injectionThis package covers R&D work associated with injection, space-charge and lattice acceptance. The challenge

here lies in the high beam current aimed for in PS2: H– injection will be tricky (and at an unprecedented 4 GeV injection energy); beam collimation will likely be required to work at high efficiency & could potentially benefit from the LARP involvement in the crystal collimation collaboration (CERN-FNAL-SLAC & others), thus having natural synergy with the Project-X work at FNAL in injection simulation and beam collimation while going beyond what has been done so far. Laser stripping is being actively investigated by SNS and would be extremely beneficial for both PS2 as well as FNAL Project X as well as SNS. The work done at BNL and other labs on the design & evaluation of imaginary-transition lattices will find its natural continuation here as imaginary transition is now the primary considered option for PS2.

PS2 Package 2: Intensity effects, InstabilitiesThis package covers R&D work on intensity and impedance-related effects incl. e-cloud. SLAC and LBL have a

history of successfull collaboration in this area, exemplified by PEP-II and the e-cloud work. The proposed package builds on the strengths of these labs in e.g. evaluating vacuum-system components both numerically as well as experimentally while at the same time extending this work into new regimes of frequency. Bunch-by-bunch feedback systems (if needed) are potentially challenging for PS2 due to tight requirements on induced noise to prevent emittance growth; these may require novel techniques to be developed for the electronics as well as for low impedance kickers. The e-cloud work would extend the LARP collaboration with SPS already in place and will potentially feed into concepts for vacuum chambers with low secondary emission. Besides SLAC and LBNL, there will be synergy with FNAL Project X work and also e-cloud work ongoing at BNL-RHIC.

PS2 Package 3: Rf SystemThis package covers R&D work on 40-MHz perpendicularly-biased ferrite-tuned rf cavities. With PS2 studies for

the time being focusing on an imaginary-transition lattice, 40-MHz rf is the obvious frequency choice. While the FNAL-Booster-type cavity design could possibly be adapted to the frequency range needed for the PS2, the desire is to complete the development of the perpendicularly biased cavity originated at LANL, which allows for 2…3 times the rf voltage/cavity. This will be a technologically challenging project to work on, and should be again of interest to FNAL. The LLRF would extend on the work done on highly beam-loaded rf systems—mainly at SLAC—while adding the challenge of variable rf frequency and the different frequency range (areas of experience at FNAL and BNL).

Download - LARP Accelerator Systems Status Plans 19 June 2008 DOE Review, LBNL Tom Markiewicz/SLAC BNL - FNAL- LBNL - SLAC US LHC Accelerator Research Program

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