European Design Study Towards a TeV Linear Collider

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European Design Study Towards a TeV Linear
Collider
WP 5 Diagnostics Coordinator Grahame Blair, RHUL
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Diagnostics Overview
Concentration TRC-priority diagnostics Linac-techn
ology independent

• This work package will produce as output
• Strong groups, collaborating internationally.
• Working prototype systems
• International test beam work
• RAs, technical staff and students gaining
• in-the-field experience.
• All the results will be included in the
  International LC
• Design Study.

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The projects proposed are

• Bunch profile
• Confocal Resonator Pick-up.
• Post Collision Diagnostics
• Energy spectrometry based on high-precision BPMs.
• Polarimetry.
• Fast beamstrahlung monitor
• Beam Phase Measurement
• Wide Band Current Pickup
• Precision Beam Position Monitor
• Beam tests at CTF3

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Participating Institutes 1

• Cambridge
• CERN

Precision beam phase measurement phase reference
with stability better than 15 fs rms over long
distances (km), as needed for timing of LC
collider beams to fulfill stability requirements
on phasing and IP collision timing. Wide band
beam current pick-up Develop a beam current
monitor with ? 20 GHz bandwidth for measurement
of intensity and longitudinal position bunch to
bunch, providing a signal for machine set-up
and for equalizing bunch-charge and -spacing.
Applicable to LC main beams, drive beams and
damping rings.
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Participating Institutes 2
Precision beam position monitor Develop a BPM
with lt100 nm resolution, lt10 µm precision, lt15ns
rise-time, with an aperture gt4 mm for beam
position monitoring in LC main beam and beam
delivery system with the performance required
from beam dynamics studies. Beam tests Tests in
the existing test facility (CTF) of profile
monitors such as Laser wire prototype.

• CERN
• (contd)
• DESY

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Participating Institutes 3

• Orsay
• Oxford
• RHUL

Develop a high power laser polarimeter based
on laser power amplification with a Fabry-Perot
cavity To provide a gain as high as 10000.
Polarimetry
Bunch Profile Monitors
Bunch Profile Monitoring
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Participating Institutes 4

• UCL
• Uppsala

BPM Spectrometry
Post Collision Diagnostics
Confocal Resonator Pickup
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Deliverables Milestones

• Beam Profile Monitor RHUL, DESY,
  Oxford,
• Milestones
• Sep 05 Install new PETRA laser.
• Mar 06 Present results on laser upgrade.
• Sep 07 Produce critique for LC beam profile
  monitor systems
• Mar 08 Input results to the international LC
  design study.
• Deliverables
• Fast scanning laserwire in 2D at PETRA
• Design of beam profile monitor system in BDS

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• BPM Spectrometry
  Cambridge, UCL, DESY, (Dubna)
• Milestones
  
• Jun 2005 Install equipment at SLAC and make
  first test runs.
• Mar 2006 Outline Proposal for BDS spectrometer
  insert.
• Mar 2007 Final beam tests spectrometer
  proposal.
• Mar 2008 Results of final tests.
• Deliverables
• Gantry tests of BPMs, Abs energy/jitter
  measurements.
• Design of spectrometer insert to BDS.
• Proposal for measurement of shape of energy
  spectrum.

• Polarimetry
  DESY, Orsay, (Lebedev)
• Milestones
  
• Jan 06 Upgraded HERA polarimeter taking data
• Sep 06 locking of high high finesse cavity with
  fs laser
• Dec 06 Report on technical design of IP
  polarimeter.
• Dec 2007 Begin the building of a concentric
  cavity.
• Deliverables
• Design report for the Compton Polarimeter
  estimates of precision
• Hardware modification data analysis of HERA
  polarimeter
• Estimates of systematic uncertainties

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• Confocal Resonator
  Uppsala
• Milestones
  
• 6 month drawings ready
• 12 month prototype manufacturing complete
• 18 month Low frequency tests complete.
• 24 month Bench tests complete, start tests with
  beam.
• Deliverables
• Proof of principle prototype of a confocal
  resonator
• Beam position and bunch length measurements with
  test beam.

• Post Collision Diagnostics
  Uppsala
• Milestones
  
• 6 month Assessment of the feasibility of the
  subsystems
• 12 month Outline of the geometry of the beam
  line
• 18 month Conceptual design and integration of
  all parts finished
• Deliverables
• Conceptual Design of beam line between IP and
  beam dump
• Integrated diagnostics to measure luminosity on
  both fast and
• slow time scales

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Budget 1 MANPOWER Preliminary!
CERN costs estimated From simple WP ratios No
breakdown by task.
Note all cost figures include overhead where
applicable
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Budget 2 MATERIALS Preliminary!
CERN costs estimated From simple WP ratios, No
breakdown by task. Orsay numbers need checking
Note all cost figures include overhead where
applicable
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Budget 3 TRAVEL Preliminary!
CERN costs estimated From simple WP ratios
institute is requesting more than the standard
3k/PY Justfication expensive to fly from
Sweden.
Note all cost figures include overhead where
applicable
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BUDGET 4 Summary Preliminary!