Closing Plenary Session Commissioning and Accelerator Physics

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Closing Plenary SessionCommissioning and
Accelerator Physics
US LHC Accelerator Research Program
bnl - fnal- lbnl - slac

• M. Syphers/FNAL
• 21 October 2004
• Napa, California

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Tuesday PM -- Agenda
Napa, CA 19-21 Oct 2004Tuesday 19 Oct
04 Commissioning and Accelerator Physics 130
Greeting Session Overview - M. Syphers
10m 140 LHC Commissioning Plans and Status -
R. Bailey 60m 240 LARP Magnet Commissioning
Issues and Plan - M. Lamm / R. Saban 45m 325
Comments and Discussion on LARP Beam and Non-Beam
Commissioning - E. Harms 20m 345 Break
15m 400 Wire Compensation Report - T. Sen
30m 430 Report on Electron Cloud
Activities - M. Furman 30m 500 Possible
Loops for Global Decoupling - Y. Luo 30m 530
General Discussion
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Summaries

• First, report on accelerator physics
• then, commissioning

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SPS wire compensation
Emittance shaving occurs early
Intensity Loss compensated by 2nd wire
Reported T. Sen
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SPS experiment tune scan
tune scan with compensation of 2 BBLRs in the
CERN SPS near the LHC working point
30.07.04
no BBLR
path in the tune diagram
compensation
F. Zimmermann via T. Sen
1 BBLR
nearly perfect compensation
?
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Wire compensation proposal
Wire Compenstion Proposal

• Experimental demonstration of the principle in
  the SPS with one wire simulating the beam and the
  second as the compensator
• Experimental demonstration in a hadron collider
  (RHIC or Tevatron) or lepton collider (e.g.
  PEP-II) - demonstrate use of the wire for the
  benefit of this collider, e.g, as scraper, or for
  future upgrades.
• RHIC - compensation of long-range collisions in
  eRHIC or after IR upgrades
• Tevatron - improving performance of Run-II /
  BTeV
• RD on pulsed wire compensation system possible
  test of pulsed wire on beam in existing machine
• Design of compensation device for LHC assuming
  success of former points.

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eCloud (M. Furman)Developments since FNAL LARP
mtg. (June 2004)
Participation in SPS EC runs (June 21-26, 2004)
CERN Arduini, Jiménez, Baglin, Schulte LARP
Iriso, Pivi, Furman initial results LHC-MAC
mtg. 14 (Jul. 12-13, 2004) ongoing analysis of
results (US and CERN) more RHIC results Hseuh,
Iriso, Zhang initial results Workshop on RHIC
experiments (Sep. 16-17, 2004) M. Jiménez
visited BNL (late Sept. 2004) formal proposal
for e-detectors in RHIC Iriso to leave BNL April
05 Well participate in the CARE HHH-2004 wkshp.
(CERN, Nov. 8-11, 2004) ECLOUD04 proceedings
almost done!
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Electron Cloud -- Summary (M. Furman)
Continue and increase SPS analysis via
simulations plan to hire an UG student 1/2 time
for this (soon, I hope) code benchmarking as part
of the process (LARP-CARE collab.) Iriso-Peggs
map technique needs continuity after UI
leaves who? Hopefully RHIC will not fully
suppress the e-cloud with coated chambers! we
need an e-cloud in the warm regions for better
testing our simulations make sure we reach the
point of installing the cold SD in RHIC I feel a
lack of critical mass in the e-cloud
effort leads to infrequent communication with
CERN people its a nontrivial effort to keep up
with CERNs and others activities maybe its a
temporary state
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Global Decoupling Loops -- (Y. Luo)
Scan (modulate) circuit strengths, look for
direction of phase difference changes to see
where to set skew quads
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Luo (contd)
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Commissioning

• Report on LHC commissioning plans and process --
  Bailey
• Report on LARP IR hardware commissioning -- Lamm
• and, on general LHC hardware commissioning --
  Saban
• Discussion of LARP involvement in beam
  commissioning, as well as non-beam commissioning
  -- Harms

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Commissioning (R. Bailey)
First 4 or 5 years will be something like this
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We will need for normal operation (year 3)

• Machine supervisor weekly responsibility need 4
• EIC on shift need 7
• Operator on shift need 7
• Cryogenics operator on shift need 7
• Accelerator Systems support
• Accelerator Physics support

R. Bailey
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Commissioning scenario
LHC Commissioning Coordinator weekly
responsibility for year 1, maybe year 2 Shift
workers CIC (on shift for year 1, maybe year
2) EIC for the future (on shift long
term) Operator (on shift long term) Hardware
commissioning veteran (year 1) Accelerator
Systems Responsibilities Accelerator Physics
Responsibilities
R. Bailey
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Accelerator Systems Responsibilities
All accelerator systems will need to be
commissioned, first during hardware commissioning
and later with beam. Once a system has been made
to run, it will need frequent expert support to
make it continue to work. While responsibility
for the performance of any accelerator system
rests clearly with the group(s) concerned, it
would prove extremely useful to have personnel
directly concerned with machine operation also
involved. This would result in a number of
mini-teams responsible for the exploitation of
particular accelerator systems.
R. Bailey
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Accelerator Physics Responsibilities
We will need a pool of accelerator physicists
ready to push through particular phases of the
commissioning program and to pick up on the
inevitable surprises that will crop up along the
way. Qualifications are very similar to those of
the CIC. Although not shift work, must be
committed to doing this until the LHC operation
becomes routine. We will also need accelerator
physicists responsible for specific aspects, or
beam-based systems. This could be done in the
style of mini-teams responsible for particular
systems.
R. Bailey
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Bailey, contd

• LARP Involvement
• 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 listed above.
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One of several lists, both HW systems and
AP Need to begin to fill out these lists
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LARP Hardware Commissioning Conclusions
HC is an important way for the US to contribute
to the LHC project Inner triplet HC contribution
is established Recent new requests in global
commissioning could greatly expand our role We
have presented our best estimate of required
costs for HC of inner triplet based on CERN
schedule Plan for success (i.e funding and
participation is minimal and without
contingency) Does not include cost of
participation in global HC Taking
responsibilities in Inner Triplet Region (an area
in which the US has a large and unique expertise)
will help in the global HC (free up CERN
personnel, LARP IR personnel can take on global
jobs). Major uncertainties Uncertainty in CERN
schedule Cost of living in Geneva (addressed at
LAPAC) Lining up the appropriate people at the
right time
M. Lamm
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Commissioning -- Saban
Summary from talk

• getting ready for the commissioning in general
  and the IT region in particular
• we need experts who will be active in the field
• with experience
• people in the tunnel getting their hands dirty
• to be deployed on hardware commissioning
• most critical need in electrical engineering,
  quench protection, machine interlocks
• we dont encourage short term (lt6 months)
• integrated in the equipment groups commissioning
  the hardware
• discussions are needed to finalize
• procedures,
• mission at CERN,
• roadmap in general,

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Commissioning (E. Harms)

• 0.1 FTE in 2005
• 0.6 FTE in 2006
• 5-6 FTE in 2007 and beyond

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Commissioning (E. Harms)

• Is planned level of participation (budget) in
  2005-2006 sufficient to ramp up efficiently for
  beam commissioning in succeeding years? (LAPAC
  voiced same concern in July)
• Names? Contact person(s) at collaborating
  laboratories.
• What role(s) should U.S. Scientists play at CERN?
• Length of visits?
• Is manpower available to assist in LHC checkout,
  etc.
• ?

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Commissioning -- Summary of Summaries

• Agree that AP/HW support efforts more feasible
  and more realistic rather than providing shift
  leaders, for example
• Note support is very much Front Line, and
  essential
• Need to start identifying people now
• NAMES -- NAMES -- NAMES !!
• begin to fill up Rogers chart(s)
• R. Bailey to meet with CERN departments, give
  presentation soon
• E. Harms to CERN 4-9 November for TI8 test will
  meet with Bailey
• S. Peggs / M. Syphers / E. Harms will start
  polling people _at_ all labs
• -- availability
• -- expertise
• -- etc.