# Presentation: 004614

## LHC Commissioning Task Force

- Vladimir Shiltsev
- for the LHC Commissioning Task Force
-   (W.Fischer, G.Ganetis, M.Lamm, A.McInturff, T.Raubenheimer, V.Shiltsev, M.Zisman)

***bnl - fnal- lbnl - slac***

_**US LHC Accelerator Research Program**_

## General Info on the CTF

- Induced by S.Peggs Letter of Feb 16, 2005
- Charge:
- Present a working draft of a ``white paper'' recommending an
-  	integrated plan for the organization of LARP participation in LHC
-  	commissioning, at the LARP collaboration meeting April 6-8, 2005.
-  	Present a final draft of the white paper to the CERN-U.S. Committee
- 	when it meets next (summer 2005).
- Evaluate LARP planning for involvement in LHC beam commissioning, in
-     consultation with Mike Syphers and Elvin Harms.
- Recommend the extent of any *additional scope** of LARP involvement in
-     Hardware Commissioning, assuming formal endorsement and support by DOE and U.S. lab directorates of a LARP role in its organization. Evaluate the desirability of merging commissioning components 2 and 3, into a single Task addressing broad hardware commissioning of just the interaction regions.
- Recommend the appropriate role of ``Toohig fellows'' -- defined, for example, as new or recent PhD accelerator physicists or engineers hired by LARP to serve for 12 months of their 2 or 3 year post-doc terms at CERN.
-  ** currently, the LHC hardware commissioning is not in scope of  US-LARP *

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  CTF (cont’d)

- CTF members represent the US-LARP labs :
- Fermilab TD		M.Lamm
- Fermilab AD		V.Shiltsev
- Brookhaven CAD	W.Fischer
- Brookhaven SMD	G.Ganetis
- Berkely AFRD		M.Zisman
- Berkeley	 AFRD	A.McInturff
- SLAC			T.Raubenheimer

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  CTF (cont’d)

- Worked via :
- E-mailing
- Video-Conferencing (March-April)
- met at Port Jeff (April)
- met at PAC’05 (May)
- Work to be finished by CERN-US Executive Committee meeting Sep.14, 2005

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  Participate in LHC Commissioning – Why?

- Benefits to the US HEP program:
- overall benefit if the LHC turns on rapidly and successfully:
- support of the US investment in the LHC
- secure future accelerator based HEP projects in the US
-  the information and experience gained will be available for:
- the LHC upgrades
- the ILC (e.g., on large 2K systems) and other future machines
- (possibly) for operating colliders, e.g. RHIC
- opportunities to
- train younger staff
- advance international cooperation
- conduct forefront accelerator physics R&D

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  Scale of US  LHC Commissioning

- Hardware Commissioning (including installation):
- Recent count shows resources missing:
- 100.5 people x ~14 mos commiss. period = 117 FTEs
- Approx 1⁄2 of them (~45 FTEs) Engineers and Physicists
- Expertise needed: Cryo Instr, Cryo Controls, Quench Protection, Interlocks, Elect-Eng, Commiss. Coordinators, Instrum. Controls
- FY’06—FY’07
- Beam Commissioning:
- tentative goal ~1 US rep /LHC shift =~(6-7) FTEs/ yr
- start in FY’07, then FY’08+FY’09+?  12-21 FTEs
- Pre-beam  Startup  Luminosity/MD Studies
- Longer term development and exploitation of US deliverables
- Areas of US interests (e.g. beam-beam, e-cloud, halo, etc)
- CERN planning on good track

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

## CERN View On LARP Involvement in LHC BC

- SPS extraction, transfer, injection and first turn
- Multi turn losses and BIS dependability
- Protection devices other than collimators
- Collimation system and Halo cleaning
- Clean Beam Extraction
- Radio protection
- Beam Instrumentation
- Vacuum conditions during operation and electron cloud
- Reference magnet system
- RF systems and longitudinal beam dynamics
- Transverse feedback
- Experimental solenoids and compensations
- Experimental equipment (Roman pots, velo)
- Beam in the injectors
- Ion beam in the injectors
- Orbit feedback system
- Filling efficiency and flat bottom conditions
- Ramp and squeeze losses and overall quality
- Machine protection system
- Optics
- Mechanical aperture
- Machine Impedance and collective instabilities
- Dynamic aperture
- Lattice corrector settings
- Triplet corrector settings
- Lifetimes
- Separation schemes
- Crossing angle schemes
- Collisions and luminosity steering
- Experimental conditions
- Ions

- Points to address for each system
- What is the specification with beam
- What measurements are needed
- What tools are needed
- What beam is needed
- How much time is needed

- R.Bailey (2005):
- “...In the present US-LARP proposal, resources are allocated for “Beam Commissioning and Accelerator Physics” activities from 2004 onwards, rising to significant numbers by 2007. In the discussions to date, we have made the point that _the US-LARP commitment has to be made with long-term individual commitments of around 12 months_, and that US staff should come to perform a specific role in the beam commissioning work. It has also been clearly said that CERN has to maintain sufficient expertise, particularly on shift, to ensure long-term exploitation of the machine
- With this in mind, we feel that a very limited number of US-LARP resources could participate in the shift rota. Rather, they would be best suited to the accelerator physics and equipment group support activities”

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  Possibilities of Participation Depend On: 

- Funding:
-  Installation/Additional Hardware – not identified yet
-  Beam/Deliverables Commissioning – by LARP
- Schedule/Uncertainties
- HC in FY’06-07 + “tail”, BC in FY’08 and beyond
- no formal indication that CERN wants US help in HC
- US side uncertainty – RHIC&TeV operations, ILC efforts
- Available Human Resources:
- CTF members approached management of corresponding labs and explained/discussed the issue
- estimated # of Eng and Phys possibly available for long (1⁄2 to 1 yr) and short (few weeks – few mos)   commit-ment; got blessing from management to count on them
- have preliminary lists of names

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  US Resources Available for LHC Commissioning

- 		          Hardware Comms.	      Beam Commissioning
- 			  long-term FTE	long-term FTE      short-term
- Laboratory        min  max       	 min  max	       est.visitors
- Fermilab	   4   7.5		  5    12		 12
- Brookhaven      0    0		  0    1*		 10
- Berkeley      1+1*    2 + 2*	  2*   2 + 2*		  8
- SLAC		   0    0		  0   1		  2
-   TOTAL	   6   11.5	 7  18		 22
-        * to be hired

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

## Younger People 

- “...Beginning in 2006, the U.S. LHC Accelerator Research Program (LARP) is looking for candidates with recent PhD's in Accelerator Physics or Accelerator Engineering to participate in LHC commissioning. Toohig Fellowships last 2 years, extendible by 1 year, with approximately equal time spent at a U.S. lab (BNL, FNAL, LBNL, or SLAC) and at CERN.”
-  Poster created, word is being spread at PAC’05  USPAS  magazines
-  we feel it’s critical to select the first candidate(s) in 2005 and set the Fellowship on good track
-  the Fellows can greatly increase the number of US physicists involved in long-term LHC commissioning visits

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  Living Abroad Issues 

- Longer Term Visit Issues
- 6 to 12 months
- Move family/schools
- Travel/Relocation expenses
- Salary adjustment to cost of living
- Insurance
- Extra money from CERN (“Project Associate”=5kCHF/mos HC)
- Taxation
- The visits should look attractive in order to bring more people
- We explored some of these issues:
- Memo from FNAL HR
- First look into taxation issues
- Studied and agreed with US-CMS guidances
- Another memo on issues for Green Card holders
- Discussion with B.Chrisman on fast(er) foreign travel approval

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  CTF Recommendations 

- We endorse the idea that LARP can be effectively used for organization of US involvement in the LHC commissioning. We recommend to form a Machine Commissioning Project (MCP) within LARP for that purpose:
- the MCP to include hardware(HC – if funding resolved) and beam commissioning (BC)
- the MCP leader(s) to approach individuals in the US labs. The CTF members can help.
- Participation in LHC hardware commissioning desirable but
- a formal Request Letter is needed from CERN followed by the US response
- funding and Scheduling HC to be addressed ASAP
- urgency to organize HC to become effective in FY’06

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  CTF Recommendations (cont’d)

- Involvement of junior staff is important:
- Definetely, in Beam Commissioning
- May be less practical for HC
- We recommend “pairing” with more experienced people
- Short term visits to collaborate/supervise younger staff to be supported by LARP
- Remote Access Room in the US can be useful (E.Gottschalk)
- Full support  for the Toohig Fellowship program
- needs to be launched in 2005
- many issues not addressed yet
- To be further explored:
-  how to combine commissioning of LARP deliverables with participation in “generic” beam commissioning
- balance between short and long-term visits

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  CTF Report (“White Paper”)

- Will address:
- Resources missing
- MC organization within LARP
- Benefits to US
- Possibilities at 4 labs
- Funding Issues
- Living Abroad
- Universities participation
- Recommendations
- CTF Report status
- Now *ver.3a* exists
- Be finished in June
- US release in June
- Final ~July ‘05

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

##  General Conclusions

- The CTF has been formed workedwrapping up
- We found that:
-  US labs can provide 1/7 to 1/4 of the manpower missed (and needed) for the LHC installation and hardware commissioning
-    – if CERN wants it and if the US makes funding available, through LARP or separately
- Possibilities for the LHC beam commissioning are up to LARP manpower aspirations.
- Organization of the US contribution to the LHC commissioning has to be energized:
- CTF recommendations has formed on that subject
- CTF members can be of further use, too
- CTF to present comprehensive report in July’05

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

## Back-up Slides

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005

## Priorities for CERN and US

- LHC Commissioning Task Force - V.Shiltsev

- June 1, 2005