H.Schmickler, LTC 26-9-2006 Critical Review of US-LARP activities on accelerator systems Based on contributions for/by: • IR upgrade studies, beam-beam compensation, e- cloud simulations: Oliver Bruening, Werner Herr, Frank Zimmermann • Beam Instrumentation: Rhodri Jones • Collimation: Ralph Assmann • Beam Commissioning: Roger Bailey
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H.Schmickler, LTC 26-9-2006 Critical Review of US-LARP activities on accelerator systems Based on contributions for/by: IR upgrade studies, beam-beam compensation,
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H.Schmickler, LTC 26-9-2006
Critical Review of US-LARP activitieson accelerator systems
Based on contributions for/by:
• IR upgrade studies, beam-beam compensation, e-cloud simulations: Oliver Bruening, Werner Herr, Frank Zimmermann
• Beam Instrumentation: Rhodri Jones
• Collimation: Ralph Assmann
• Beam Commissioning: Roger Bailey
H.Schmickler, LTC 26-9-2006
Outline• 2006 = 1st year of full US-LARP funding• Time for a critical review:
- accelerator systems: LTC 27th of September- magnet R&D, hardware commisioning:Special AT meeting on 4th of october feedback to collaboration meeting (end of October, close to BNL)
• Information on LHC@FNAL and LAFS• Sensitive issue: Payment of US collaborators (PJAs)• Detailed technical feedback• Conclusions
H.Schmickler, LTC 26-9-2006
LHC@FNAL
• New bilateral collaboration FNAL – CERN in order to build and operate a CCC copy at FNAL
• Initiative by FNAL (Erik Gottschalk et al.) originally motivated for remote operation of LHC experiments
• Extended to accelerator control now• Remote Operation and diagnostics has been part
of LARP conceptual mandate in the beginning; dropped for low priority.
• LHC@FNAL very active; leads to PJAS at CERN; contributing to LHC controls; work supervised by Mike Lamont and Pierre Charrue
H.Schmickler, LTC 26-9-2006
LAFS (= LHC Accelerator Fermilab Software?)
• Newly proposed bilateral collaboration FNAL-CERN• Collaboration agreement on the desks of the big chiefs• Will make available for controls/operational software
efforts up to ten PJAS (a bit optimistic…)• Today focus of work:
- Role based access - Sequencing - Snap Shot Analysis Software (Tevatron Operations Tool)
• Work defined by Mike Lamont, Eugenia Hatziangeli, Pierre Charrue
• Team at FNAL: Dave McGinnis et al.
H.Schmickler, LTC 26-9-2006
PJAS at CERN• Very sensitive issue: US –PJAS will come to work at CERN based
on several different collaboration agreements- US-LARP, LAFS, LHC@FNAL, others…
• In terms of payment they should all be treated the same;i.e. salary by home institute + 4 (5) ksfr/month extra allowance
• The collaboration agreements are different:1) LAFS and LHC@FNAL: PJAS allowance paid by CERN2) US-LARP: PJAS funding (mainly for beam commissioning or subsystem commissioning) is part of US-LARP commitment!CERN does NOT pay PJAS allowance3) EXTRA resources demanded by CERN for hardware commissioning: LARP has proposed itself for organization of this help; CERN pays PJAS allowance!
• We have to get this clear, otherwise we end up in a big mess.
Feedback on USLARP CollaborationsLHC IR upgrade studies:
LTC; 27.9.2006 AB-ABP Feedback 6
mainly organized through the CARE / ESGARD HHH network
main deliverable: optics solutions for new IR layout
USLARP is mainly involved in Ni3Sn upgrade studies which
are based on the nominal LHC layout no new optics required
main contribution was the proposal for flat beam operation at
LUMI’05 in Archidosso (however, follow-up optics studies
were carried out at CERN)
other deliverables: magnetic TAS:
very little progress after 3 years of discussion!
right now all collaborators seem to mainly follow their own agenda
the collaboration could clearly benefit from better coordination!
Feedback on USLARP CollaborationsLHC optics and commissioning studies:
LTC; 27.9.2006 AB-ABP Feedback 7
mainly organized through direct contacts between CERN & LBNL
main deliverables:
diagnostics tools (procedures) for measuring -beat in the LHC (% level)
proposal for correction algorithm based on measurements
collaboration works well and first results have been discussed in the LHCCWG
at CERN.
collaboration benefits greatly by ‘on site’ residence of a USLARP
Toohig fellow facilitates communication and prepares an eventual active
USLARP contribution to the LHC commissioning
Toohig fellow will also participate now in LUMI’06 workshop before the return
to BNL
Feedback on USLARP Collaborationselectron cloud studies:
LTC; 27.9.2006 AB-ABP Feedback 8
mainly organized through direct contacts between CERN & LBNL & BNL
main deliverables:
independent simulation tool to the code that has been developed
at CERN cross check and confidence in simulation results
perform simulation studies for the LHC at LBNL
outsourcing (only 0.2 FTE working on e-cloud at CERN)
USLARP to specify best conditioning scenario during startup
little results in ‘03 / ’04 but bug fixes and new results in ’05 / ‘06
measurements in RHIC and simulations at BNL
provides network for studying e-cloud effects in existing machines
collaboration provides USLARP with insight into effect at LHC and helps
during preparing active USLARP support during LHC commissioning
cooling capacityat low & high L
OLD POSINSTw/o rediffused
NEW POSINSTw/o rediffused
ECLOUDLTC40
e-cloud heat load in LHC dipole with old & new POSINST w/o re-diffused e- and ECLOUD result (Miguel Furman)
note:re-diffusedelectronsincreaseheat load ~2x
Feedback on USLARP Collaborationsbeam-beam studies (simulation and theory):
LTC; 27.9.2006 AB-ABP Feedback 10
mainly organized through direct contacts between CERN & LBNL
main deliverables:
collaboration on beam-beam simulations with LBL (J. Qiang and
M. Furman) on strong-strong simulations on coherent effects and
emittance growth. Same programs are used for RHIC studies.
studies showed potential problem for partially overlapping beams
Results have been quantitatively confirmed with other programs.
studies now extended to commissioning and beam finding scenarios,
including runs with low luminosity (i.e. 450 GeV)
exchange of results and discussions on regular basis
Feedback on USLARP Collaborationsbeam-beam studies (simulation and experiments):
LTC; 27.9.2006 AB-ABP Feedback 11
mainly organized through direct contacts between CERN & LBNL & FNAL
main deliverables:
experimental and simulation setup for long range beam-beam
collision compensation using wires at RHIC in BNL:
compensation of single LR collision in RHIC MDs in ’05/‘06
simulation of 60-120 lumped LR collisions in measurement using wires
compensation with two BBLRs for beams colliding head on
explore & demonstrate feasibility of LR compensation for
implementation in the LHC.
collaboration works well and first RHIC MD results have been discussed with
CERN. However, usefulness of RHIC set-up (only one long range collision point
and scalability to LHC is not obvious).
Long-range beam-beam effect in RHIC at 100 GeV
• LR at s=10.6m• Octupoles on in Yellow• Blue beam moved
measurement of losses vs. separation (Wolfram Fischer)
beam-beam simulation for RHIC experiment (Ji Qiang): emittance growth vs. tunes for different separations
4 separation5 separation
6 separation
US-LARP Instrumentation PackagesInstrumenting the TAN – Luminosity monitors for IR1 and IR5
• Started with LBNL as part of theUS-LHC construction project Initial R&D very promising Problems with US-LARP budget
approval slowed things downconsiderably a few years ago, along with a lack of CERN manpower for effective follow-up.
Due to this, CERN limits collaboration with LBNL to luminosity and longitudinal profile monitoring is abandoned
Recent injection of new manpower by LBNL and a pressing installation schedule have served to advance the project significantly
It does now look as if the deliverables will be installed just in time
• Started as bilateral agreement betweenCERN & BNL – later integrated intoLARP with additional support from FNAL Original deliverable was for complete PLL tune system
• Was never really viable for such a critical LHC system• New system (BBQ) is CERN designed and built, but based on the lessons learned
from the RHIC system Testing of this system at both RHIC and Tevatron has been invaluable in the
continued development of the system. Understanding the effect of coupling on the PLL and its subsequent
measurement at RHIC was a major leap forward. RHIC has now successfully tested both tune and coupling feedback using a
CERN BBQ front-end Both parties currently working on demonstrating chromaticity feedback This has been a very positive collaboration which will hopefully ensure that
the LHC starts up with a viable PLL tune meter capable of being used for tune, chromaticity and coupling feedback.
• Accepted as part of LARP in October 2006 A strong driving force both on the CERN side
(Fritz Caspers) and FNAL side (RalphPasquinelli) has ensured that 4 Schottkymonitors are now being assembled forinstallation at CERN next month
This has been a model collaboration with bothsides open to new ideas while working towardsa common goal.
• Time was invariably helped by the very tighttime constraints imposed on the project!
• General Remarks on all US-LARP instrumentation packages Role of beam commissioners needs to be clarified between labs & LARP
• Who can come, for how long and when Support is required for the software integration of these systems
• Who does what still to be clarified between LHC@FNAL / BI / CO
http://www-project.slac.stanford.edu/ilc/larp/
Status of LARP Activities on Collimation
Work driven through monthly video meetings BNL – CERN – FNAL – SLAC!
Talks and info on web site (see above).
US coordination: T. Markiewicz, SLAC
SLAC – Phase 2 collimator for LHC beam tests: Work proceeding well. Dedicated SLAC work force increased. Cutting metal at SLAC.
FNAL – Study tertiary collimators (TCT) IR1/IR5: After initial delays and complaints recently results presented for IR5. Confirms TCT design choices gain factor 5-10. Completed once IR1 is done.
BNL – Radiation tests for collimator materials: Important experimental radiation data for CFC material. Good news on radiation resistance though damage concern remains.
BNL – Comparison RHIC loss maps with predictions: Very limited progress. CERN doctoral student (G. Robert-Demolaize) will join BNL/RHIC on January 1st. Continue work…
SLAC Collimator Design and Prototyping: Rotatable LHC Collimator
First prototype with helical cooling circuit(SLAC workshop)
Design with 2 rotatable Cu jawsStrong SLAC commitment and effort:
CommissionerScheduled shifts years 1,2Pool of at least 7 needed
EICScheduled shifts long term
7 needed
OperatorScheduled shifts long term
7 needed
G.ArduiniG.Arduini
R.AssmannR.Assmann
M.GiovannozziM.Giovannozzi
S.FartoukhS.Fartoukh
J.UythovenJ.Uythoven
J.WenningerJ.Wenninger
F.ZimmermannF.Zimmermann
A.ButterworthA.Butterworth
M.AlbertM.Albert
G.CrockfordG.Crockford
R.GiachinoR.Giachino
G.H.HemelsoetG.H.Hemelsoet
D.JacquetD.Jacquet
L.NormannL.Normann
F.PirotteF.Pirotte
A.ReyA.Rey
R.SuykerbuykR.Suykerbuyk
E.VeyrunesE.Veyrunes
S.RedaelliS.Redaelli 01.0601.06
M.GruweM.Gruwe 01.0601.06
R.AlemanyR.Alemany 08.0608.06
L.PonceL.Ponce 08.0608.06
W.VenturiniW.Venturini 01.0701.07
EIC6EIC6 04.0704.07
EIC7EIC7 04.0704.07
R.BaileyR.Bailey
M.LamontM.Lamont
O.BruningO.Bruning
P.CollierP.Collier
Accelerator systems Contact
Technical Services
TI operations P.Sollander
Controls H.Schmickler
Electrical supply J.Pedersen
Cooling and ventilation J.Inigo-Golfin
Access & safety systems T.Pettersson
Hardware Commissioning
Cryogenics L.Serio
Main Ring Magnets Performance A.Siemko
Insertion Magnets Performance R.Ostojic
PIC B.Puccio
QPS K.H.Mess
Power converters F.Bordry
Beam Commissioning
Beam vacuum N.Hilleret OK
Magnetic Optics Commissioning J.P.Koutchouk
Beam Machine Protection Systems R.Schmidt
Radiation Protection D.Forkel-Wirth
Radiation Monitoring T.Wijnands
Beam Transfer V.Mertens OK
RF T.Linnecar OK
Beam Instrumentation R.Jones OK
Collimation R.Assmann
High level controls M.Lamont
Operational phases R.Bailey
Accelerator physics O.Bruning OK
Experimental Conditions H.Burkhardt
TakeAs
Given
DevelopThese
US LARP involvementUS LARP involvement
No involvement in core team working 24/7 in the CCCNo involvement in core team working 24/7 in the CCC
Interest expressed in many Accelerator SystemsInterest expressed in many Accelerator Systems Mostly Mostly
AP, BI (see slides)AP, BI (see slides) Controls (not LARP, but rather LHC@FNAL)Controls (not LARP, but rather LHC@FNAL) CollimatorsCollimators
And a little onAnd a little on Beam transferBeam transfer Snapback, ramp, squeezeSnapback, ramp, squeeze Machine protectionMachine protection
So nearly all covered by other LARP chaptersSo nearly all covered by other LARP chapters
Our present scheme does not explicitly have a pool of Our present scheme does not explicitly have a pool of experienced people for general troubleshootingexperienced people for general troubleshooting Perhaps this is something that we needPerhaps this is something that we need If soIf so this is a role where this is a role where the right USthe right US staffstaff could contribute could contribute
Collisions and beam-beam W.Herr, R.AssmannR.Moore, J.AnnalaE.HarmsLuminosity
W.Herr, R.AssmannH,Burkhardt
Summary (1/3)Summary (1/3)
Administartion problem of PJAS payment to be Administartion problem of PJAS payment to be communicated (again) and to be respected in all communicated (again) and to be respected in all branches of the collaboration.branches of the collaboration.
New initiatives (LHC@FNAL, LAFS) popping up. New initiatives (LHC@FNAL, LAFS) popping up. These are well matched to the immediate needs of These are well matched to the immediate needs of the LHC. the LHC. New US-LARP collaboration proposals as discussed New US-LARP collaboration proposals as discussed during / after the collaboration meeting of April 2006during / after the collaboration meeting of April 2006(LTC) found by far less enthusiastic CERN reactions.(LTC) found by far less enthusiastic CERN reactions.For US-LARP to rethink its strategy…For US-LARP to rethink its strategy…
US-LARP is receptive for criticism and the proposal US-LARP is receptive for criticism and the proposal of corrective measures: example: collimation of corrective measures: example: collimation simulation studies at FNAL, engineering approach simulation studies at FNAL, engineering approach for luminosity monitors at LBL…for luminosity monitors at LBL…
Summary (2/3)Summary (2/3)
LHC IR upgrade studies: Better Coordination requiredLHC IR upgrade studies: Better Coordination required E-Cloud simulations: Positive results, Should be E-Cloud simulations: Positive results, Should be
maintained at that low level of effortmaintained at that low level of effort B-B compensation: Completely unclear if work in the B-B compensation: Completely unclear if work in the
US at RHIC is relevant for LHC: Should be worked out US at RHIC is relevant for LHC: Should be worked out in a reviewin a review
B-B simulations: Good resultsB-B simulations: Good results LHC lumi monitors: Reduced Scope (IP1 and IP5 only), LHC lumi monitors: Reduced Scope (IP1 and IP5 only),
good progress to deliver in time.good progress to deliver in time. Tune and Chromaticity feedback: Good results, Tune and Chromaticity feedback: Good results,
technology driven by CERN, active collaborationtechnology driven by CERN, active collaboration Schottky Monitors: Good progress due to strong Schottky Monitors: Good progress due to strong
engagement on CERN and FNAL side.engagement on CERN and FNAL side.
Summary (3/3)Summary (3/3)
In general all BI: Software design, coding and testing In general all BI: Software design, coding and testing not defined. Needs to be done now in collaboration not defined. Needs to be done now in collaboration with AB-CO and AB-OP.with AB-CO and AB-OP.
4 different labs involved in collimation activity4 different labs involved in collimation activity…working pretty well.…working pretty well.
Beam Commissioning: Long iterations for the past 2 Beam Commissioning: Long iterations for the past 2 years. Present US-LARP involvement/commitment years. Present US-LARP involvement/commitment only on present collaboration items.only on present collaboration items.From CERN the future LHC operations teams are well From CERN the future LHC operations teams are well defined and slots/roles are made available for outside defined and slots/roles are made available for outside collaborators. US-LARP has to manifest further collaborators. US-LARP has to manifest further interest now.interest now.