LARP Accelerator Systems Synthesis Vladimir Shiltsev bnl - fnal- lbnl - slac US LHC Accelerator Research Program

LARPAC 05/11/ Shiltsev 2 Content What’s new after October’05 Collaboration Meeting –LARP Org Chart changes, communication, DocDB, Web –FY06 Budget – spending to date –DoE Review Nov’05; RC review + Lumi Review –LARP Collaboration Meeting LBL Accelerator Systems Progress Highlights New proposals –“hard deliverables” vs new proposals –“Gang of 5+1” –Stream of consideration & approval process

LARPAC 05/11/ Shiltsev 3 Accelerator Systems Org Chart V.Shiltsev Accelerator Systems Instrumentation: A.Ratti Tune Feedback (P.Cameron) Luminometer (A.Ratti) Schottky Monitor (A.Jansson) Commissioning: M.Syphers Beam Commiss-ing (E.Harms) IR Coms-ing (M.Lamm) Collimators R&D: T.Markiewicz Efficiency Studies (A.Drees) Rotating Collim. (T.Markiewicz) Tertiary Collim (N.Mokhov). Irradiation Studies (N.Simos) Accel Physics: W.Fischer E-cloud (M.Furman) IR & Beam-Beam (T.Sen) Wire Compens’n (T.Sen) Recent Changes: Wolfram Fischer (BNL) to lead AP

LARPAC 05/11/ Shiltsev 4 Communication/Coordination Communication within LARP: –VideoConf of all AS L2s+Steve ~once/mos –One-on-one meetings (site visits, reviews, etc) ~once/qrtr –Collaboration meetings ~twice/year Communication with CERN –First “long-termers” (P.Limon et al) –Visits (HC, BC, Instr, etc) >1/mos –Workshops (e.g. TAN) and reviews (e.g. RC) ~once/qrtr –LARP Collab Meetings ~twice/yr –US-CERN meetings ~ once/yr LARP Doc DB is functioning: –~280 docs uploaded from Oct’05-Apr’06

LARPAC 05/11/ Shiltsev 5 Introduced in Oct’05 Collab Mtg (FNAL) Main tool at the Apr’06 Collab Mtg (LBL) Management of –Agenda Anyone can/may do it, but should be “convener” or session chair No need to keep agenda externally –Talks/documents The speaker is responsible for maintaining the integrity of his/her document

LARPAC 05/11/ Shiltsev 6 USLARP.org web site –Uses Plone A widespread wiki implementation –Elliott McCrory is working on making this site useful Jump point to other web resources –Anyone can modify the content/layout You have your own username/password There are lots of LARP web sites –LBNL –BNL –Fermilab AD & TD –SLAC ? Web pages

LARPAC 05/11/ Shiltsev 7 FY06 Accelerator Systems Budget Pete got extra 150k$ to cover past investments BNL BC funds redistributed to FNAL and LBL  -60k$ RC hardware start delayed  -350k$ Nick got extra +50k$ for PhII irradition extra +30k$ To build BB-Wires

LARPAC 05/11/ Shiltsev 8 Accel.Syst. Spendings 1.2M/3.6M=33% thru ½ year Mar.31, 2006

LARPAC 05/11/ Shiltsev 9 Topics Make sure that we achieve all milestones –And spend $$ approx as planned Reviews –Be prepared and pass numerous reviews (small and big one) Next year planning/budget –Have clear understanding of what will we do next year New initiatives –Should always have a healthy pressure of new proposals –Now anticipate some $$ to be freed after diagnostics development and fabrication finished in 2007

LARPAC 05/11/ Shiltsev 10 DoE Review of LARP November 2005 “The review committee was very pleased with the presentations on beam instrumentation and accelerator physics. In addition, they found the idea of participation in the development of a remote control room a very interesting possibility for enhancing interactions with CERN from afar via the Fermilab project Plans for commissioning of LHC hardware are already being implemented, with the first U.S. staff member (Peter Limon) already stationed at CERN. It was reported by management that U.S. laboratories will provide staffing for this effort, and, in fact, FNAL has committed seven persons to this task. LARP and CERN will cover costs of travel and additional living expenses in the Geneva area. Finally, the committee again emphasized its displeasure with the lack of formality in dealings of LARP, and strongly recommended a more effective bookkeeping system for managing expenses and progress on all active tasks, and a person who would be responsible for implementing such a system”.

LARPAC 05/11/ Shiltsev 11 Task Sheets Task Sheets are written by L2s and approved by L2s and L1s and L0 Most useful documents Objective, milestones, funds and personnel resources – all can be found on one page Semi-annual reports are lined up along these Task Sheets

LARPAC 05/11/ Shiltsev 12 Reporting

LARPAC 05/11/ Shiltsev 13 Fixing “…lack of formality…” : RLS

LARPAC 05/11/ Shiltsev 14 Other Directive Documents

LARPAC 05/11/ Shiltsev 15 Another Concern: Sign-Offs Alex Ratti developed an acceptable – for both US and CERN – 6-item SignOff Documentatation scheme Now – for instrumentation only It’s model for other tasks (Collimators, Wires, etc)

LARPAC 05/11/ Shiltsev 16 Internal Reviews Rotating Collimator-1 CDR Review –December 2005, chaired by W.Turner –OK, advised to design jaw support before “cut iron” Luminsity Monitor Final Design Review –April 2006, chaired by T.Shea –All positive, technical risks low to medium Schottky Monitor Final Design Review –June 2006, at CERN Tune FB Final Design Review –Before FY’07, m.p. at BNL

LARPAC 05/11/ Shiltsev 17 TCFB on RHIC ramp P.Cameron Good publicity is part of LARP success measure– we need to get more articles like that!

LARPAC 05/11/ Shiltsev 18 Luminosity Monitor The only real-time bunch-by-bunch luminosity measurement in the LHC –25 ns bunch spacing, 1% resolution R&D phase has been completed –Demonstrated 40 MHz performance using ALS X-ray beamline Technical Challenges –Extremely high radiation levels up to ~250 Grad –Signal processing to avoid pileup 25 ns bunch spacing Project Milestones: –Final Design Review (Apr 06) –System test at RHIC (Summer 06) –Four systems complete (Winter 06-07) –Installation and integration support (07) DAQ TAN FE electronics

LARPAC 05/11/ Shiltsev 19 LHC 4.8 GHz Schottky Design R.Pasquinelli A.Jansson Remarkable Progress: –Final drawings ready for CERN inspection –Final Design Review 06/19/06 at CERN –Will be the first LARP “thing” delivered to CERN –Plan to be one of anchors for BC for monitoring

LARPAC 05/11/ Shiltsev 20 LARP commissioners receive “Project Associate” status, join a CERN group (AT/ACR or AT/MEL) for nominally one year and contribute to the groups general HC responsibilities as well as US deliverables. One commissioner stationed at CERN now. 3-4 additional to follow in the fall of Peak participation in Summer’07 Commissioning of US Deliverables and General HC Since Nov’05 DOE Review: 1 st USLHC String transported to tunnel LARP Oversight and technology transfer for USLHC interconnects Transportation and Installation of 2 nd IR quad/DFBX/D1 on going.

LARPAC 05/11/ Shiltsev 21 LHC Beam Commissioning Accelerator Systems commissioners will Organized on task groups of 3-4 people (e.g. instrument operations+ developer+controls+physicist) LARP is heading toward having (at least) a double presence in the LARP instruments groups Will require coordination between L2s of “Instrumentation” and “Commissioning”

LARPAC 05/11/ Shiltsev 22 Beam Commissioning Progress

LARPAC 05/11/ Shiltsev 23 EoI Circulated

LARPAC 05/11/ Shiltsev 24 Start-Up  Committee’s work complete  Endorsement received from  Fermilab Directorate  Affected Fermilab Divisions/Sections (AD, PPD, CD, FESS)  LARP management  CMS management  Construction plans in development  Funds set aside/awaiting DOE approval  Center planned to be open in September 2006

LARPAC 05/11/ Shiltsev 25 PHASE-I: Irradiation and Analysis of 2D Carbon-Carbon at BNL GOALS: Determine resilience of 2D CC against irradiation damage and assess how the critical property of thermal expansion changes with irradiation assembly irradiation Post-irradiation Analysis it is expected to meet the 25 micron RESULT: PHASE-I 2D Carbon-Carbon self anneals irradiation ramage through thermal cycling in both strong and weak directions. Therefore, it is expected to meet the 25 micron condition set as goal Phase-II LHC Collimator Material Irradiation Planned for May 2006 done! (May 4, 2006)Primary Materials: Annealed Copper and Glidcop (85% Cu – 15% Al) – done! (May 4, 2006) Other Potential Candidates: Super Invar, Gum Metal, 3D Carbon-Carbon Material Irradiation Studies

LARPAC 05/11/ Shiltsev 26 Rotating Collimator: Rescheduled Slip schedule ~6 months –Single jaw tests, support/stopper design & write-up by EOFY06 –RC1 performance report by mid FY07 –$400k returned to LARP management in FY06 adjustment –Expect slippage of Jan 2008 beam-testable RC2 delivery consistent with CERN’s latest schedule RC task is one of “hard deliverable” and requires closer attention at SLAC and LARP to avoid any further slippages

LARPAC 05/11/ Shiltsev 27 Satisfactory Benchmarking (POSINST) experiment simulation Benchmark code against HCX experiment (LBNL) expt. and sim. agree quantitatively on characteristics of e – oscillations observed in magnetic quadrupole flooded with electrons:

LARPAC 05/11/ Shiltsev 28 Wire Compensator In CY06 – construct and install a wire compensator in RHIC, downstream of Q3 in IR6 RHIC beam-beam experiments in April 2006 Motivation: Test of wire compensation in 2007 Determine if a single parasitic at top energy causes beam losses that need to be compensated. Similar experiment done last year at injection energy - found strong effects at separations ≤ 6σ. 2 experiments done so far – April 5 th, April 12 th Beam-beam simulations of 2006 experiments Motivation: Tests and improvements of codes, predictions of observations in 2006 and of wire compensation Four groups FNAL, SLAC: LBL; University of Kansas

LARPAC 05/11/ Shiltsev 29 Recently initiated (minor) activities: –Flux jumps effects –dB/B measurements Potential new L3 tasks (need feasibility studies): –AC dipole –Crystal collimation –Longitudinal Density Monitor –e-lenses for Head-on B-B Compensation –Crab cavities Considerations on Large Scale Improvements: –1.5TeV Injector in LHC tunnel LER-LHC –Optical Stochastic Cooling New Initiatives (Apr’06 Coll.Mtg.)

LARPAC 05/11/ Shiltsev 30 Consideration Process “Gang of 5+1” is formed to consider/propose that (L2s+VS+SP) General requirements: –Interesting subject, development should push up the state of the accelerator physics and technology in the US –Of interest for LHC –Collaboration of >1 Lab, Universities welcome –Not at expense of current unfinished tasks –Right time and budget scale Considerations finished and decision taken: –Either before start of FY’07 LARP Exec.Comm. June 5) –After presentation of feasibility study results at the Collab Mtg Then, L3 task formed, one of L2s picks it up  plan, RLS, $$, etc

LARPAC 05/11/ Shiltsev 31 Common questions to answer Title/subject Leader and participants Objectives Deliverables Time scale/schedule Resources needed: –Add’l man-power (and type eng, phys, techs) –$$ Travel –$$ Labor –$$ M&S and Equipment

LARPAC 05/11/ Shiltsev 32 Flux Jumps An accelerator magnet would need to demonstrate no or sufficiently small fluctuations How small? preliminary estimates show that 1 unit of d(b3) will result in ~2 units of Q’ jumps if residual dispersion controlled to better than 1 cm at I tune jumps and nonlinear effects need to be studied (AccelPhys)

LARPAC 05/11/ Shiltsev 33 dB/B Fluctuations LHC tolerance: dB/B~3e-10 LHC screen: light and feels 20 K He flow turbulence; B-flux is constant at 3kHz  dB/B ~ dR/R  need dR < 1A to blow horizontal emittance First attempts at CERN (2006): ~1e-8 noise in quad/no screen ~1e-7 with air flow

LARPAC 05/11/ Shiltsev 34 dB/B: Plan of Action Perform dB/B measurements at CERN inside –Dipole (cold, high current) –Quadrupole (same) –Measure vibrations of the screen and LB quadrupole Will take about 1 year Cost: –2-3 more trips to CERN~6k$ –Low-noise pre-amp~5k$ Goal: conclude on dEmm/dt and need of FB Consider: use of Tune FB BBQ and kicker - ?

LARPAC 05/11/ Shiltsev 35 AC dipole Recent good results from the Tevatron Formal proposal for LHC at Collab meeting (Apr ’06) Collaboration formed including Fermilab (A.Jansson, M.Syphers), UT Austin (R.Miyamoto, S.Kopp), BNL (M. Bai, R. Calaga) and CERN (H.Schmickler, J.Serrano) First AC dipole data in the Tevatron

LARPAC 05/11/ Shiltsev 36 Objective –Investigate the conceptual design of ac dipole for LHC System design (Magnet, power system, tuning range) test system –the principles either at Tevatron or RHIC Physics motivations and relevant beam experiments at RHIC and Tevatron Financing –LARP: R&D –CERN: Final systems, funding available earliest at 2008 –NSF through university program Deliverables –conceptual design report –Test system(s) –Relevant beam studies at Tevatron and RHIC Detailed feasibility study plan by June 12 (DoE R) AC dipole collaboration

LARPAC 05/11/ Shiltsev 37 Longitudinal Density Monitor (DeSantis, Byrd, Zolotorev) Fiberoptic coupler/lens Electro-optic modulator InGaAs PD Fiberoptic PC Fast pulser MHz Data acquisition board (ADC) Presented at the LARP Coll.Mtg. CERN interest is limited as they already have abort gap monitors (enough for start-up) LDM can be a very useful tool for high luminosity operation …Under consideration for LARP Fresh Idea: Couple SyncLite to optical fiber, deliver signal upstairs and process it there with electro- optical modulator 50 ps slices, 10 s integration, resolves 0.5M p (!) To see ~1e-5 tails of main bunches and ghost bunches

LARPAC 05/11/ Shiltsev 38 Head-on beam-beam compensation If beam sizes and shapes are matched (e=p) for LHC N_p=1.1e11, N_ip=4, for 10kV electrons (beta=0.2) one needs N_e=4.4e11 or J_e=1.2 A in L=3 m long e-beam approx Gaussian e-current distribution with rms = mm … or donut shape?

LARPAC 05/11/ Shiltsev 39 Challenges of Head-On Compensation Total current is not a challenge Optimum beam profile (vs bunchlength/beta*, Qx,y) Compression to mm is doable, though not easy Keeping beam straight within mm Beam-beam centering within mm Will bending sections do harm?

LARPAC 05/11/ Shiltsev 40 e-Lens configurations

LARPAC 05/11/ Shiltsev 41 Head-On BBC Action Path Form an LHC eCompensation Task Force with a charge to perform feasibility study in ~1 year –FNAL, BNL, SLAC, LBL, UKansas Goal is to explore parameter space and effectiveness of head-on BBC in LHC and RHIC Cost: buried in Accel Physics “Beam-Beam” task In case of positive outcome, next steps may include: Design of the TEL for RHIC 2007 ~200k$ SWF Construction of TEL for RHIC ~1300k$ M&S Demonstrate head-on compensation ~200k$ SWF Build TELs for LHC ~1100k$ M&S Install TELs in LHC and commission ~200k$ SWF Total: 3,000k$

LARPAC 05/11/ Shiltsev 42 Q’s to Answer: Will Gaussian or truncated Gaussian e-current density distribution work (improve lifetime and reduce diffusion rates)? –Straightforward tracking with a weak-strong code –Is partial compensation helpful? Is there a better distribution? –from first principles, theory, analytical consideration –Effects are beta_TEL/beta*/sigma_z; or dP/P –check in numerical tracking Importance of e-pbar(p) interaction in bending sections –Which of three configurations is better? –Is the choice tune dependent? Lifetime deterioration due to e-p misalignment: –e-beam straightness tolerances –relative e-p displacement, angle Effect of low-frequency variations dJ, dX on beam lifetime Ion cleaning efficiency tolerances Cross-interaction with wires in LHC – if there is any e-beam effect on coherent stability or strong-strong beam-beam effects

LARPAC 05/11/ Shiltsev TeV SuperFerric Injector in LHC tunnel J.Johnstone T.Sen, H.Piekarz

LARPAC 05/11/ Shiltsev 44 Summary LER-LHC Title: LER – A 1.5 TeV Injector Accelerator for the LHC Leader & Participants: Henryk Piekarz, Steve Hays, Yuenian Huang, John Johnstone, Gijs de Rijk, Lucio Rossi, Tanaji Sen, Vladimir Shiltsev Objectives: Determine feasibility of the LER accelerator Deliverables: A preliminary design of the LER accelerator Time scale/schedule: One year Resources needed: - Travel ($50 K) - Low Field VLHC magnet test at 1.6 T ($50K) Plan of Action : Make preliminary studies, prepare several presentations and attend LER-LHC Workshop at CERN (July 5, 2006) see its outcome and CERN position before committing any further resources

LARPAC 05/11/ Shiltsev 45 Amplifier average power (W) Damping time, sec Lead ions Undulator: period-=7 m field = 10 T, number of periods = 3 Damping time for protons ~ 5 hours at 1kW amplifier power Optical Stochastic Cooling A.Zholents M.Zolotorev Plan of Action : support letter for OSC demonstration experiment (NSF) wait for results Bypass optics Optical amplifier Proof-of-principle with electrons Needs for R&D:

LARPAC 05/11/ Shiltsev 46 BackUp Slides

LARPAC 05/11/ Shiltsev 47 B-field is frozen at high frequencies

LARPAC 05/11/ Shiltsev 48 FY2006: –Design and construct a wire compensator –Install wire compensator in RHIC in summer 2006, downstream of Q3 in IR6 –Perform theoretical studies to test the compensation and robustness FY2007: –Study the wire compensation in RHIC with 1 proton bunch in each beam and nominal conditions at flat top and 1 parasitic interaction. –Beam studies to test tolerances on: beam-wire separation compared to beam-beam separation, wire current accuracy and current ripple FY2008: –Decide on scope of work for the LHC wire compensation Wire Beam-Beam Compensation Overall Plan

LARPAC 05/11/ Shiltsev 49 Contiguous with helical tube inside jaw. Formed after assembly-brazing of jaw and installation of bearing on stub-shaft Exits through support shaft per CERN design Material: CuNi10Fe1, 10mm O.D., 8mm I.D. Stub-shaft (bearing not shown) Support shaft Detail of flex cooling supply tube Relaxed (as shown) # coils 4 O.D.111mm (4.4in) full 360° rotation# coils5 O.D.91mm (3.6in) torque9.1N-m (81in-lb)

LARPAC 05/11/ Shiltsev 50 L2 Leader: Tom Markiewicz (SLAC) FY06 budget 850 k$ Goals: –The LHC cleaning system must have exceptional efficiency to meet its design parameters, significantly beyond the state-of- the-art that is achieved in existing colliders. It is crucial for the success of the LHC that different paths are explored in order to optimize the design, hardware and operational procedures for the LHC collimation system. In view of the exceptional difficulty for the LHC it is essential to pursue parallel R&D studies in- and outside of CERN. The phased approach for the LHC collimation system will allow to test various proposals and to implement the best solutions in an already defined upgrade path to nominal performance. The LHC Collimator R&D will complement the work at CERN and will be performed in close L3 tasks: –Cleaning Efficiency Studies –Rotating Collimators R&D –Tertiary Collimators Studies –Material Irradiation Studies 1.3 LHC Collimation R&D

LARPAC 05/11/ Shiltsev 51 L3 Leader: Angelika Drees (BNL) FY06 budget 50 k$ Goals: –The ultimate goal of this sub program is to bench mark code(s), in particular SIXTRACKwColl, in a variety of aspects with RHIC beams. –We plan to install and implement at BNL accelerator tracking code identical with the one used at CERN (K2, SIXTRACK with Collimators, i.e. SIXTRACKwColl) and perform simulations of collimation efficiencies and loss maps which will then be compared to simulation results from earlier studies done at RHIC with other codes (Teapot, K2, ACCSIM) and with data. Various data sets at two energies are available. –During the RHIC proton run collimator setup procedures should be implemented into the RHIC control system and tested with beam under real operating conditions Cleaning Efficiency Studies

LARPAC 05/11/ Shiltsev 52 FY2006: –debug the code –compare with other simulation and data, test setup procedures, –finish reports Cleaning Efficiency Studies: Overall Plan

LARPAC 05/11/ Shiltsev 53 L3 Leader: Tom Markiewicz (SLAC) FY06 budget 720 k$ Goals: –The ultimate goal is a successful design for low impedance, high efficiency LHC secondary collimators. The design will be validated with a sufficient but small (1-3) number of prototypes and beam tests. The design specifications and the prototypes are the primary deliverables. The time scale is set by the desirability of testing the prototypes with LHC beam in 2008/09. Then, CERN will decide whether or not to proceed with the rotating collimator design. If a decision is made to proceed, this sub-project will provide an engineering drawing package to CERN and will support the effort to commission the collimators once they are manufactured and installed by CERN Rotating Collimators

LARPAC 05/11/ Shiltsev 54 June CERN/SLAC Collaboration Meeting Attendees –CERN: Ralph Assmann (Project Leader, Tracking), Allesandro Bertarelli (Mechanical Eng.), Markus Brugger (Radiation Issues), Mario Santana (FLUKA) –SLAC: Tom Markiewicz, Eric Doyle (ME), Lew Keller (FLUKA), Yunhai Cai (Tracking), Tor Raubenheimer Radiation Physics Group: Alberto Fasso, Heinz Vincke Results –Agreement on basic design of RC1 (1 st rotatable prototype) –Transfer of many of CERN mechanical CAD files –Lists of Further studies required Outstanding Engineering Issues requiring more design work Project Milestone List & Action Items List –Test Installation of “New FLUKA”

LARPAC 05/11/ Shiltsev 55 Conceptual Design of RC1 (1 of 2) Mechanics must fit within CERN Phase I C-C envelope –224mm center-to-center with 88mm OD beampipes –1480mm longitudinal flange-to-flange –25mm adjustment/jaw (22.5mm relative to beam w/±5mm allowed beam center motion and use Phase I alignment and adjustment scheme –Two 75cm Cu cylindrical jaws with 10cm tapered ends, 95cm overall length with axes connected to vertical mover shafts –136mm OD with 9mm taper –Each jaw end independently moved in 10um steps –Vacuum vessel sized to provide 8mm clearance to adjacent beam and allow gross/fine 0°, 45°, 90° positions Relaxed mechanical deformation specifications –<25 um INTO beam guaranteed by adjustable mechanical stop(s) Ride on groove deep enough to not be damaged in accident case Adjustable between ±5 and ±15 sigma (2-6mm) & centered on beam –<325 um (750um) AWAY FROM 0.8E1p/s loss (4E11p/s) Flexible support on adjustment

LARPAC 05/11/ Shiltsev 56 Proposed layout 136mm diameter x 950mm long jaws, vacuum tank, jaw support mechanism and support base derived from CERN Phase I

LARPAC 05/11/ Shiltsev 57 Stop prevents gap closing as jaw bows inward due to heat Jaw ends spring-loaded to the table assemby … move outward in response to bowing May use two stops to control tilt Slot deep enough to avoid damage in accident Stop far enough from beam to never be damaged & is out of way at injection Adjustable gap-defining stop

LARPAC 05/11/ Shiltsev 58 Rigid round-square transition Spring loaded fingers ground two jaws through range of motion Jaw support & gap adjustment borrowed from CERN RF Contact Overview

LARPAC 05/11/ Shiltsev 59 LHC Phase I 2D carbon-carbon Irradiation Specimen at BNL BLIP Facility 117 MeV or 200 MeV BNL LiNAC Protons (depending on the isotope production requirements downstream) Preliminary Assessment: 2D CC specimens normal to the planes of reinforcing fibers and close to the center of the beam (receiving high dose) experienced degradation. Less degradation was seen in the specimens along the reinforcement.  NOTE: Total dose received MUCH HIGHER than what LHC collimator jaws will see. Status: Phase I Carbon-Carbon irradiation completed Sample activation measurements completed Thermal Expansion of specimens started PLANNING of FY06 Post-Irradiation and Follow-up Irradiation Studies

LARPAC 05/11/ Shiltsev 60 Phase-II LHC Collimator Material Irradiation Planned for May 2006 Primary Materials: Annealed Copper and Glidcop (85% Cu – 15% Al) Other Potential Candidates: Super Invar, Gum Metal, Also: 2D Carbon-Carbon and 3D Carbon- Carbon Test for physical properties (thermal conductivity, thermal expansion) And Stress-Strain (mechanical properties)

LARPAC 05/11/ Shiltsev 61 POST IRRADIATION ANALYSIS REVEALED THAT PHASE-I 2D Carbon-Carbon Self Anneals Irradiation Damage through thermal cycling in both strong and weak directions. Therefore, it is expected to meet the 25 micron condition set as goal Annealing along strong (fiber plane) direction Annealing along weak direction Shown is annealing under different levels of irradiation damage

LARPAC 05/11/ Shiltsev 62 PHASE-I: Irradiation and Analysis of 2D Carbon-Carbon at BNL GOALS: Determine resilience of 2D CC against irradiation damage and assess how the critical property of thermal expansion changes with irradiation assembly irradiation Beam exposure and irradiation damage assessment Post-irradiation Analysis At irradiation levels several orders of magnitude than what the LHC collimator jaws will see the 2D CC suffers structurally from irradiation exposure

LARPAC 05/11/ Shiltsev 63 Physics: Long RHIC SPS :  ~ d 5 [measured 11/09/04] Tevatron:  ~ d 3 [measured in HEP stores, TEL] RHIC :  ~ d 4 or d 2 [measured 04/28/05, scan 4]

LARPAC 05/11/ Shiltsev 64 L2 Leader: Michael Syphers (FNAL) FY06 budget 1,140 k$ Goals: –There is an overall benefit to the U.S. high-energy physics program if the LHC turns on rapidly and successfully. Our experimental physics groups have invested heavily in the LHC project, and the science produced there thus represents a return on the U.S. investment. A healthy and strong HEP activity at LHC will surely be necessary to secure future accelerator-based HEP projects in the U.S. The information gained during the commissioning will be available in a timely manner and will have maximum positive effect on U.S. plans for LHC L3 tasks: –Beam Commissioning –Hardware Commissioning –Toohig Fellowship –New Initiatives 1.2 LHC Commissioning

LARPAC 05/11/ Shiltsev 65 FY2006: –S/N study of low intensity bunches in Tevatron –Design pick-up structure, study PLL DAB board for DAQ –complete an “integration document”, signed off by both parties, and entered into CERN EDMS –Design and build front-end electronics Q1 –Joint LARP and CERN review of the proposed design FY2007: –Adapt Fermilab analysis software –Hardware commissioning at CERN without beam FY2008: –Hardware commissioning at CERN with beam FY2009: –Beam studies of chromaticity measurements, ramp effects Schottky Monitors Overall Plan