AGS RSVP Review

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• AGS RSVP Review
• 4-5 November 2004
• AGS RSVP Upgrades - Overview
• Philip Pile
• Collider-Accelerator Department
• 4 Nov 2004

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Outline
AGS RSVP Upgrades - Overview

• RSVP Construction and Operations
• AGS RSVP Project organization
• RSVP Experiments
• Physics Goals and Beam Requirements
• K0PI0 Issues
• MECO Issues
• General Considerations

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Aerial view
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AGS/RHIC Accelerator Complex
1200 oclock
PHOBOS
200 oclock
1000 oclock
RHIC
400 oclock
800 oclock
600 oclock

• AGS
• Intensity 7 ? 1013 protons/pulse
• Injector to RHIC
• lt 1 hour about every 4 hours

Fast extraction
U-line
High Intensity Source
NSRL (NASA)
m g-2
LINAC
RSVP (NSF)
Pol. Proton Source
AGS
BOOSTER
Slow extraction
TANDEMS
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Past AGS Review

• DOE Review of RSVP Activities at BNL, 27-28 Jan
  2004
• Principle charge to review impact of RSVP work on
  RHIC operations
• Quote from findings
• In summary, the Committee concluded that the
  RSVP experiments will have minimal impact on the
  Nuclear Physics program at BNL. Plausible
  solutions exist for potential higher failure
  rates or longer repair times. The overall
  management structure of the project was found to
  be in the initial stages of development.

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RSVP Operations Plan

• AGS Fixed target experiments are presently not
  supported concurrent with RHIC operations since
  HEP base support has terminated (FY03). AGS fixed
  target experiments are still supported but are
  scheduled to operate outside RHIC operations and
  only if this can be done with minimal impact to
  RHIC activities. Full operations costs are
  recovered. Two AGS experiments ran in this mode
  in FY2004 K0PI0 (RSVP Experiment) and a US
  Atlas test
• The NSF plans to provide base support (s for
  personnel and materials) for AGS operations for
  the RSVP experiments. With this support,
  concurrent operation with RHIC is planned as well
  as limited running outside RHIC operations.
• Logistics of AGS fixed target operation with RHIC
  will be covered in another presentation (RSVP
  Operations and DD - Pile)

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AGS floor changes, RSVP era

• MECO will be situated in the A-line (7.5 GeV/c
  beam). K0PI0 will be situated in the B-line (25.5
  GeV/c beam)
• The AGS NASA Radiobiology experiment (A3 beam)
  will be relocated at RSVP expense.
• The RHIC e-cooling RD project will be situated
  in the North East Building Addition (C1/C5 beam
  area)
• The D-line will be decommissioned.
• Beam will be delivered to only one experiment at
  a time (no beam splits).

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AGS Experimental Area

• The Plan
• D-Line Decommissioned
• Switchyard simplified
• A,B,C Lines run as ORs

Oct 04
FY2006 Experiments Firm Commitment
V1, p m Beam Line
V-Target
U Line
RHIC Transfer Line

A3 RSVP, MECO E940, m N eN (NSF ? 2005
construction start)
D-Target

NASA Radiobiology
A-Target

B-Target
C-Target

B -Target

B5 RSVP, K0PI0 E926, KL0 p0nn (NSF ? 2005
construction start)

D-Line Decommission FY2006-7
RHIC eCooling Test Facility (under construction)
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Construction with RHIC
RSVP construction during RHIC operations

• Present situation during RHIC injection
• Switchyard not accessible with beam in AGS
• K0PI0 primary cave (B-line) accessible
• MECO primary cave probably ok, fault study needed
• Almost decoupled from RHIC operations
• Plans
• AGS extraction beam plug
• Will allow access in switchyard and elsewhere in
  AGS SEB area
• New A-line (MECO) beam plug
• Will allow beam in any other beam line
• Will allow work on MECO primary beam from RF
  Kicker on
• New B-line (K0PI0) beam plug
• Will allow beam in any other beam line
• Will allow work on K0PI0 primary beam outside of
  switchyard
• This decouples RSVP construction from RHIC
  operations

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RSVP Construction Impact on RHIC

• Except for AGS modifications, RSVP construction
  will be independent of the RHIC operations state
• NO IMPACT
• A combination of present C-AD personnel and new
  hires will be used for RSVP construction. If
  conflicts arise between RHIC and RSVP priorities
  for shared personnel, RHIC wins and RSVP issues
  have to be worked out to not impact RHIC
• NO IMPACT

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Component activation during RSVP operations
A concern

• Same limits to lost beam power will be applied
  during RSVP operations
• Accelerators remain maintainable by hand
• K0PI0 proton throughput ( 20 Tp/s) is similar to
  previously achieved
• MECO proton throughput ( 40 Tp/s) is x2
  previously achieved
• RSVP integrated protons x2 pre-RSVP era
• Cool-off period of a few hours required to
  access activated areas for emergency repairs -gt
  possible impact on RHIC. Partially offset by
  early detection of failed components.
• Preventive replacement of strongly exposed
  components
• Replace one or two Booster magnets every year as
  indicated by High Pot tests
• Replace extraction elements once during RSVP
  experiment

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RSVP Project Organization
JOINT OVERSIGHT GROUP NSF DOE NP
DOE HEP NSERC
RSVP PROJECT DIRECTOR and DEPUTY W. Willis, J.
Kotcher
MECO WBS 1.3 M. Hebert
KOPIO WBS 1.2 M. Marx
AGS WBS 1.4 P. Pile/A. Pendzick
1.4.4 MECO D. Phillips
1.4.1 AGS Booster K. Brown
1.4.2 Switchyard A. Pendzick
1.4.5 Project Office
1.4.3 K0PI0 C. Pearson
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AGS Infrastructure Costs (fully burdened)
includes Personnel, MS, DTS and Power Costs,
assumes Jan 04 plan, FY06-FY10 running with RHIC
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AGS/Booster WBS 1.4.1

• Four parts to this
• AGS/Booster legacy repairs and high intensity
  upgrades (11.5M Direct)
• Not part of the original RSVP cost estimate
• Result of internal analysis since the Jan 04 DOE
  Review
• Environmental requirement - Radiation Caps on AGS
  and Booster is largest piece (3.6M Direct)
• MECO Specific Modifications (0.9M Direct)
• Was in MECO Experiment WBS prior to July 2004
• K0PI0 Specific Modifications (3.9M Direct)
• Was in K0PI0 Experiment WBS prior to July 2004
• AGS beam development
• Originally in NSF pre-ops budget area (not part
  of construction budget)

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Switchyard WBS 1.4.2

• New to the RSVP Project (3.7M Direct)
• Existing switchyard not in condition to support
  high intensity operation for RSVP experiments
• Simplification/Modernization planned
• Beam plugs to decouple construction work from
  beam development
• Replace obsolete equipment
• Minimize beam loss
• Achromatic beam tunes to target stations
• No beam servoing
• No ramped magnets
• No beam splitters
• No beam sharing
• No Lambertson magnets
• Less instrumentation needed
• Less maintenance

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K0PI0 WBS 1.4.3 (7.0M Direct)

• Prior to July 2004, managed by the K0PI0
  experiment
• Primary Beam up to and including target station
• Neutral Beam
• Experimental area
• Project support and integration

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MECO WBS 1.4.4 (7.6M Direct)

• Prior to July 2004, managed by the MECO
  experiment
• Primary Beam up to and including target station
• Superconducting Solenoid and refrigeration
  infrastructure (support role)
• Experimental area
• Project support and integration

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AGS Project Office WBS 1.4.5 (1.1M Direct)

• New to the RSVP Project as a result of July 2004
  NSF-DOE MOU
• Overall schedule and integration
• Fiscal
• Reporting

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RSVP Participants

• Scientific Collaborations
• US Collaborators
• Arizona State University
• Boston University
• Brookhaven National Laboratory
• University of California, Irvine
• University of California, Berkeley
• University of Cincinnati
• University of Houston
• University of Massachusetts, Amherst
• Stony Brook University
• University of New Mexico
• New York University
• University of Pennsylvania
• Syracuse University
• Thomas Jefferson National Accel Facility
• University of Virginia
• Virginia Polytechnic Institute and State
  University
• College of William and Mary

Sponsoring agency National Science Foundation,
Division of Mathematical and Physical Sciences,
MREFC Program. Host Laboratory Brookhaven
National Laboratory, Operated by Brookhaven
Science Associates for the Department of Energy,
Office of Science, Division of Nuclear Physics
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RSVP Physics
_

• KOPIO- Measurement of KL ? ?0??
• Uniquely determines JCP, the fundamental
  parameter of SM CP-violation, with 2
  precision
• Single event sensitivity lt1x10-12 (SM predicts
  3 x 10-11)
• 105 improvement over previous experiments
• MECO Search for m-N ? e-N
• Not allowed in SM, allowed in SUSY models at
  10-15 level
• Single event sensitivity lt2x10-17 (present
  limit 6x10-13)

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K0PI0 Experiment
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K0PI0 Floor Layout
K0PI0 K0L ? p0nn
B-Target
K0PI0 Floor Layout
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MECO - Fatures
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MECO floor layout
MECO Experiment
RF Kicker
A-Target
8 GeV/c Beam
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Summary RSVP Beam Requirements

• KOPIO
• 100 ?1012 ppp 5.3 s cycle extraction _at_ 25.5
  GeV/c 20 ?1012 p/s
• Proton throughput (p/s) achieved
• AGS injection energy upgrade to 2 GeV and Booster
  injection improvements to reach 100 ?1012 ppp
  (RD)
• Slow extraction with micro-bunching (lt300ps (s)
  every 40 ns)
• Extraction with high frequency cavity (25 MHz,
  100 MHz) (RD) lt 250 ps every 10 ns demonstrated
  (FY02 test) no change in losses
• Extinction of 10-3 (RD), 8x10-6 demonstrated
  using 4.5 MHz cavity FY04
• MECO
• 40 ?1012 ppp 1 s cycle extraction _at_ 7.5
  GeV/c 40 ?1012 p/s
• No transition losses and reduced AGS injection
  losses (RD)
• Slow extraction of 2 bunches with 10-9
  extinction during 1.35 ms gap.
• h2 Booster operation achieved 22?1012 protons
  per Booster cycle
• Two Booster cycles per AGS cycle
• Bunch merging to 2 bunches or develop h1 Booster
  ops. (RD)
• Gap cleaning with resonant transverse kicker plus
  RF kicker in beam line (RD)
• lt 1x10-7 extinction achieved at 7.4 GeV/c with
  one low intensity AGS bucket filled, FY98 test

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K0PI0 Test Beam Result Microbunch width
Simulation
2002 test beam result
93 MHz cavity at 22 kV gave s 240 ps.
93 MHz cavity at 22 kV gave s 217 ps.
Simulation
Data
Microbunch time, in ns
Microbunch time, in ns
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K0PI0 Test Beam result Interbunch Extinction
2004 Test Beam Result
Simulation
4.5 MHz cavity at 130 kV gave e 8 (/- 6) x
10-6
4.5 MHz cavity at 130 kV gave e 1.7 (/- 0.9)
x 10-3.
Interbunch events
Simulation
Data
Interbunch events
Microbunch time, in ns
Microbunch time, in ns
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Extinction Test
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Summary AGS modifications

• K0PI0 (intensity, bunch width and extinction)
  Partially funded through Canadian Foundation for
  Innovation (CFI)
• Additional section for new A10 AGS injection
  kicker
• Upgraded pulse forming network for Booster
  extraction kicker
• 25/100 MHz micro-bunching cavities
• MECO (extinction)
• Upgraded AGS AC dipole (CW operation)
• AGS Strip-line kickers (100 ns) and associated
  electronics and power amplifiers
• External beam line RF Modulated Magnet/Lambertson
  dipoles/small cross section target

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More Details

• See
• K0PI0 (Sivertz) and MECO (Hebert) supplemental
  information on the web at
• http//server.c-ad.bnl.gov/esfd/RSVP/November2004/
  rsvp-presentations.htm
• And
• AGS/Booster/Switchyard Modifications and RSVP
  Beam Implementation Brown, later this morning

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Comments

• With planned AGS/Booster upgrades, RSVP should
  operate with full intensity with minimal risk to
  RHIC operations
• With planned Switchyard reconfiguration, RSVP
  experiments will be decoupled from each other and
  RHIC operations and should not experience
  significant down time due to Switchyard component
  failure
• The C-AD staff stand ready to accommodate the
  needs of both K0PI0 and MECO

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• Supplemental Information

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AGS Floor RSVP Experiments
Switchyard
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K0PI0, Master Milestone Schedule(assumes a
FY2006 MRE construction start)
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MECO Milestones
MECO Major Milestone Schedule (Assumes an FY2005
MRE Construction Start)
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AGS Switchyard - Present
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RSVP Era Switchyard
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K0PI0 Neut Beam
K0PI0 Neutral Beam Line
Collimators
B-Target
Dipole Sweeper Magnets
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MECO Future Home
A3 (future MECO) Beam Line beam left 2004
Remains of E865
NASA Radiobiology
Muon collider target test facility
Beam Left Side
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MECO Future Home
A3 (future MECO) Beam Line beam right 2004
Beam Right Side
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K0PI0 Future Home
B5 (future K0PI0) Beam Line 2004
E871 Condo
SNS Test Facility