Eric Prebys Fermilab Director LARP Novemer 14 2012 Outline History Current personnel activities Transformation of LARP Novemer 14 2012 Prebys Joint HiLumiLARP Meeting 2 Important changes coming ID: 427593
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Slide1
Personnel Update and LARP Long Term Plans
Eric Prebys, FermilabDirector, LARP
Novemer 14, 2012Slide2
Outline
HistoryCurrent personnel activitiesTransformation of LARPNovemer 14, 2012
Prebys - Joint HiLumi/LARP Meeting2
Important changes coming!Slide3
LARP History
The US LHC Accelerator Research Program (LARP) was formed in 2003 to coordinate US R&D related to the LHC accelerator and injector chain at Fermilab, Brookhaven, and BerkeleySLAC joined shortly thereafter Has also had some involvement with Jefferson Lab, Old Dominion University and UT AustinLARP has contributed to the initial operation of the LHC, but much of the program is focused on future upgrades.
The program is currently funded at a level of about $12-13M/year, divided among.Accelerator researchMagnet research (~half of program)Programmatic activities, including support for personnel at CERN
Novemer 14, 2012
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LARP Contributions to Current LHC Operation
Schottky detectorUsed for non-perturbative tune measurements (+
chromaticities, momentum spread and transverse emmitances) – Operational (currently some issues)
Tune tracking
Implement a PLL with pick-ups and quads to lock LHC tune
–
Fully integrated
Investigating generalization to chromaticity tracking
AC dipole
US AC dipole to drive beam
Measure both linear and non-linear beam optics –
Primary tool for high energy optics
Luminosity monitor
High radiation ionization detector integrated with the LHC neutral beam
absorber (TAN) at IP 1 and 5.
–
Functional, becoming primary fast system.
Synchrotron Light MonitorUsed to passively measure transverse beam size and monitor abort gapNot a LARP project, but significantly improved by LARP – Operational (currently some issues)Low level RF toolsLeverage SLAC expertise for in situ characterization of RF cavities – Fully integratedPersonnel Programs…
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Prebys - Joint HiLumi/LARP MeetingSlide5
Toohig Fellowship
Named for Tim Toohig, one of the founders of FermilabOpen to recent PhD’s in accelerator science or HEP.
Successful candidates divide their time between CERN and one of the four host labs.PastHelene Felice, LBNL, now staffRama
Calaga
, BNL, now CERN staff
Ricdardo
de Maria, BNL, now CERN Fellow
Themis
Mastoridis
, SLAC, now CERN Fellow
Ryoichi Miyamoto, BNL, now ESS Staff
Dariusz
Bocian
, FNAL, now Ass. Prof.
at
The
Henryk Niewodniczański Institute of Nuclear Physics PresentSimon White, BNLValentina Previtali, FNALJohn Cesaratto, SLACIan Pong, LBNLIf interested, visit:http://www.interactions.org/toohig/
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Prebys - Joint HiLumi/LARP Meeting
At this meetingSlide6
Long Term Visitors Program
LARP Pays transportations and living expenses for US scientists working at CERN for extended periods (at least 4 months)Past:Jim Strait, FNAL – Machine protection/splice consolidationSteve Peggs
, BNL – UA9Alan Fisher, SLAC – Synchrotron Light MonitorRama Calaga, BNL – crab cavities and commissioningEliana Gianfelice
, FNAL – abort gap
cleaning
Uli
Wienands
, SLAC – UA9, PS2,
PSBPresent:
Chandra
Bhat
, FNAL – flat bunches for Large
Pewinski
Angle solution,
SPS lifetime issues
Alexey
Burov, FNAL – Instabilities in the injector chain, new injection ideasExtremely successful at integrating people into CERN operationsBig thanks to CERN for their support of this programInterested parties coordinate with a CERN sponsor and apply to the program (contact me)Novemer 14, 2012
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Prebys - Joint HiLumi/LARP MeetingSlide7
Bhat Activities
e-Cloud in the LHC during the HL-LHC eraBunch brightness in the HL-LHC will be > 4x nominal LHC. We have investigated if
Bunch Flattening can be used as a possibleEC
mitigation technique in the
LHC
The proposed Landau cavity (required
to
stabilize the high intensity beam) in
the
HL
-LHC will not pose any EC related
complications
.
LHC MDs:
Large
Piwinski
Angle studies using theIP8 spectrometerStudy on longitudinal single bunch instability in the LHC
PS MD: Constant density (water bag) distributions in the PS to study single and multi-bunch instability, applicable to the LHC
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Burov
LTV Activities
Nested head-tail (NHT) instabilityNHT
a
Vlasov
solver being built by
A
.
Burov
(FNAL/LARP-LTV) for transverse
beam
instabilities
(
Acknowledgements to
V.Danilov
,
E.Metral
, N.Mounet, S.White, X.Buffat, T.Pieloni).Circular modes for flat beams in the LHCCircular optics in the injectors would allow hiding smaller transverse emittance from thespace charge tune shift, thus allowing this emittance
to be really small. Round-to-flat beam transformation at LHC/SPS injection line would provide flat
beams at collision, opening a great perspective for super-high luminosity (no crab cavities!)
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Important Magnet Update
Original planFollow HQ with 4m x 120 mm LHQUse this to demonstrate technology for 120 mm prototype as part of large scale construction projectDevelopmentsIn June 2012, CERN chose 150 mm as the aperture for the HL-LHCJuly 2012 LARP review recommends abandoning LHQ to pursue 150 mm prototype
New planCurtail 120 mm program to long ¼ magnet “mirror” testsWe feel there are still important things to learnBegin working with CERN on 150 prototype as part of an integrated production plan for Nb3
Sn quads in LS3.
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Revised Magnet Schedule
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Crab Cavities
Technical ChallengesCrab cavities have only barely been shown to work. Never in hadron machinesLHC bunch length
low frequency (400 MHz)19.4 cm beam separation
“compact”
(exotic) design
Additional benefit
Crab cavities are an easy way to level luminosity!
Currently aiming for:
Down-select ~next year
SPS test in 2015
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LARP
UKSlide12
Other Important LARP Projects
High Bandwidth Feedback for SPS and/or LHCLeverage experience with LLRF to design feedback system to damp instabilities (particularly electron cloud)Energy Deposition StudiesIn response to requests from CERN and review recommendations, we have engaged the Fermilab Energy Deposition Group (Mokhov and Co.), as well as expertise at SLAC, to simulate energy deposition in the final focusing magnets.
Investigating high radiation studies at BNL and/or CERN HiRadMat facilityRotatable CollimatorA long time LARP project
Completing prototype for tests
at CERN
Not certain what the future use
may be
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Important Projects (cont’d)
Hollow electron beam collimation
Grew out of electron beam-beam compensationTested at TevatronConsidering a test in the LHC
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Evolving Priorities in Accelerator Systems
Top funded in FY12Crab cavities“Ecloud”, primarily in support of R&D into SPS feedback
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Slide n
°
14
* SUBSTANTIAL un-billed Labor from, especially, Fermilab NOT included Slide15
Future Planning: New Direction
At the DOE’s request, we are in the process of transforming LARP into a project to encompass all US contributions to the luminosity upgrade of the LHC.Budget GuidanceFlat-Flat LARP funding @ ~$12.3M/year through FY16
A total of $200M (then year dollars) TPC, assuming CD-2 at approximately the beginning of FY17“Some amount” of General Accelerator Development (GAD) funds diverted in support of this program (still being negotiated).First DeadlineSubmit a list of candidate deliverables and a plan for down-selection by September 4, 2012Done: LARP-DOC-1069 [
http://
tinyurl.com
/LARP-Down-Selection]
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Candidate Projects
Traditional LARP Scope150 mm aperture Nb3Sn quadrupolesLikely just cold masses, divided between here and CERN
Crab CavitiesPrototypes? Production Units? Cryomodules?High Bandwidth Feedback SystemPick-ups? Processing Systems? Response Kickers?
New Scope
11 T Nb
3
Sn dipoles
Used to make room for collimation in dispersion suppression region
Has been a bilateral CERN/FNAL effort
Large Aperture
NbTi
D2 separator magnets
First dual aperture magnets near
Irs
Has been bilateral CERN/BNL effort
Not included
Collimation: No plan
no scopeNovemer 14, 2012Prebys - Joint HiLumi/LARP Meeting16Slide17
The Process
Currently working with Fermilab support to put all projects into consistent levels of budget and scheduleContingency, escalation, etcWe know the total will be ~$400!First pass completed last week
Currently working with the down-selection committee to prioritize, down select, and re-scope to fit with the budget guidanceEric Prebys, FNAL (LARP)Tom Markiewicz
, SLAC (LARP)
GianLuca
Sabbi
, LBNL (LARP)
Lucio
Rossi, CERN
Oliver
Brüning
, CERN
Bruce Strauss, DOE
Stuart Henderson, FNAL (Laboratory Oversight Group)
TBD (Additional Lab Representative)
Goal: Submit proposal for project scope on December 21
st, 2012Proposal will also include time line of Project Execution Plan (PEP) to mean CD-2 milestone at beginning of FY17.Novemer 14, 2012Prebys - Joint HiLumi/LARP Meeting17Slide18
Where we are
First (very preliminary!) pass at costsTwo things clear:Total too large
Profile starts too earlyNovemer 14, 2012
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Compare to ~$250M
Compare to $12.4M/yearSlide19
In Broad Strokes….
We still have to refine cost estimates, but some things are becoming clear.We can’t do everything!Committed to a major stake in Nb3Sn quadsThat will eat up the lion’s share of resources
Would like to commit to crabs up to the SPS test.Possibly further constructionOptions for the remaining scope:FB?
Propose we do development, CERN builds final hardware
11 T dipoles?
Large scale production unlikely. Prototype?
D2?
No technical challenges. How important is this to CERN?
We need feedback from CERN about what the priorities are
amng
these projects.
Big question: do we shrink quad scope to support more of the other projects?
E.g. build only Q1 or Q3?
These are very important discussions for
this meeting!
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Message to US DOE
We can make significant contributions to the LHC luminosity upgrades within the budget guidanceHowever, most of the projects require some of the $200M TPC to appear well before 2017Cannot begin these major efforts on LARP funding alone!It’s important that we work with the DOE and the labs to
quantify the general accelerator development (GAD) money available to this effort, and bring it under control of the project.Novemer 14, 2012
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Restructuring of LARP
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Will fight to keep scope for general R&D!