# Presentation: 881376

## Accelerator Systems: Overview

- Vladimir Shiltsev

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

_**US LHC Accelerator Research Program**_

## LARP Technical Scope

- Letter from Joint Oversight Group (DOE and NSF, 02/05/2003):
- “  The research program should be planned to make optimal use of the infrastructure and expertise within participating US National Laboratories and should be worked out with CERN on the basis of mutual interest.
- The planned research could be expected to include:
-     participation in beam commissioning and ongoing optimization of beam parameters;
-    beam experiments, including construction of specialized instrumentation, aimed at both improved LHC performance and fundamental beam physics questions
-    design and development of equipment for improvements to the LHC, such as 2nd generation IR quads and advanced instrumentation.”

- LARP DoE Review 06/12/2006 - Shiltsev

## LARP AS Deliverables

-  The  Joint DoE/NSF Guidance (Feb’03) defines LARP as a world-class R&D and scientific research program at the frontier of accelerator science and technology.
- The deliverables of the research should improve U.S. capability and not be products or intellectual contributions that are readily available either at laboratories or in the marketplace.
- Although some fabricated deliverables are envisioned within the program, major physical deliverables will be separately funded as projects proposed and approved following standard procedures.

- LARP DoE Review 06/12/2006 - Shiltsev

## LHC Technical Challenges

- 					      Tevatron	    LHC
- 						[March ‘06]         [“nominal”]
- Luminosity [cm-2 s-1]		1.7e32	    100e32
- Magnet style			1-in-1	     2-in-1
- Beam-beam tuneshift		0.025		     0.010
- # of bunches			36		     2,808
- Beam stored energy [MJ]	 1		      366
- B-field stored energy [MJ]	 300		    10,600
- Chromaticity snapback dQ’     ~40		     ~100
- Tolerable loss on ramp		~2-4%	  ~0.01-0.1%

- LARP DoE Review 06/12/2006 - Shiltsev

## Program Components

- Collimation system R&D:
- avoid uncontrolled losses  Phase I system till L~0.1 Design
- test various proposals for Phase II  Rotating Collimators?
- LARP Collimator R&D complements the work at CERN
- Development of beam instrumentation:
- build specialized diagnostics beyond the usual set
- push the state-of-the-art, some help US machines
- be ready in 2007 for LHC commissioning of the LHC and operation
- Participation in LHC Commissioning:
- benefit to the U.S. HEP program if the LHC turns on rapidly and successfully
- make available US (firstly, Tevatron and RHIC) expertise
- train younger generation of accelerator scientists and engineers
- LHC Accelerator Physics/Upgrades Studies:
- need of deep understanding of beam physics at the frontier hadron collider and evaluation of the upgrade paths
- mix of calculation, simulation and experimentation
- mix of activities at home institutions in the U.S. and at CERN

- LARP DoE Review 06/12/2006 - Shiltsev

## LARP AS Organization

- LARP DoE Review 06/12/2006 - Shiltsev

## FY06 Accelerator Systems Budget

**FY06 Accelerator Systems Budget**

- LARP DoE Review 06/12/2006 - Shiltsev

## L2 Leader: 	Alex Ratti (LBL)
FY06 budget: 	1635 k$ 
L3 tasks:
1.1.1.2 Tune feedback		
P.Cameron (BNL)	430k$

1.1.1.2 Luminometer		
A.Ratti (LBL)		960k$

1.1.1.4 Schottky monitor	
A.Jansson (FNAL)	245k$

- FY06 budget: 	1635 k$
- L3 tasks:
- 1.1.1.2 Tune feedback
- P.Cameron (BNL)	430k$
- 1.1.1.2 Luminometer
- A.Ratti (LBL)		960k$
- 1.1.1.4 Schottky monitor
- A.Jansson (FNAL)	245k$

**1.1 Instrumentation**

- LARP DoE Review 06/12/2006 - Shiltsev

## L2 Leader: 	Michael Syphers (FNAL)
FY06 budget: 	879 k$ 
L3 tasks:
1.2.1.1 Beam Commissioning
E.Harms (FNAL)	335k$

1.2.1.2 Interaction Region Commissioning 	
M.Lamm (FNAL)	501k$

1.2.1.3 Hardware Commissioning
M.Lamm (FNAL)	43k$

- FY06 budget: 	879 k$
- L3 tasks:
- 1.2.1.1 Beam Commissioning
- E.Harms (FNAL)	335k$
- 1.2.1.2 Interaction Region Commissioning
- M.Lamm (FNAL)	501k$
- 1.2.1.3 Hardware Commissioning
- M.Lamm (FNAL)	43k$

**1.2 Commissioning**

- LARP DoE Review 06/12/2006 - Shiltsev

## L2 Leader: 	Tom Markiewicz (SLAC)
FY06 budget: 	500 k$ 
L3 tasks:
1.3.1.1 Phase I cleaning efficiency studies
A.Drees (BNL)	50k$

1.3.2.1 Rotating Collimator R&D
T.Markiewicz (SLAC)	320k$

1.3.2.2 Tertiary Collimator Study
N.Mokhov (FNAL)	30k$

1.3.2.3 Colimator material irradiation study
N.Simos (BNL)	100k$

- FY06 budget: 	500 k$
- L3 tasks:
- 1.3.1.1 Phase I cleaning efficiency studies
- A.Drees (BNL)	50k$
- 1.3.2.1 Rotating Collimator R&D
- T.Markiewicz (SLAC)	320k$
- 1.3.2.2 Tertiary Collimator Study
- N.Mokhov (FNAL)	30k$
- 1.3.2.3 Colimator material irradiation study
- N.Simos (BNL)	100k$

**1.3 Commissioning**

- LARP DoE Review 06/12/2006 - Shiltsev

## L2 Leader: 	Wolfram Fischer (BNL)
FY06 budget: 	670 k$ 
L3 tasks:
1.4.1.1 Electron cloud studies
M.Furman (BNL)	200k$

1.4.1.2 Interaction Regions and beam-beam
T.Sen (FNAL)		260k$

1.4.1.3 Beam-beam compensation with wires
T.Sen (FNAL)	210k$

- FY06 budget: 	670 k$
- L3 tasks:
- 1.4.1.1 Electron cloud studies
- M.Furman (BNL)	200k$
- 1.4.1.2 Interaction Regions and beam-beam
- T.Sen (FNAL)		260k$
- 1.4.1.3 Beam-beam compensation with wires
- T.Sen (FNAL)	210k$

**1.4 Accelerator Physics**

- LARP DoE Review 06/12/2006 - Shiltsev

## “Hard” Deliverables

-  “Hard deliverables” are defined as systems or components developed for the LHC which are:
- crucial to LHC performance
- “plan B” is weak or non-existent
- This tasks need special protection in the face of an unforeseen LARP budget and manpower shortfalls
- Both CERN and LARP Executive Committee endorsed following  LARP Accelerator Systems tasks as “hard deliverables”:
**Luminosity Monitors**
**Tune Feedback**
**Beam & Instrumentation Commissioning **
**Rotatable Collimators**

- LARP DoE Review 06/12/2006 - Shiltsev

## Review Presentations

-  L2 reports:
-  technical highlights, accomplishments
-  milestones and budget
-  Summary:
-  program execution, scorecard
-  reviews, communication
-  new tasks and activities

- LARP DoE Review 06/12/2006 - Shiltsev