ATF UKUSDESYKEK

1
ATF (UK/US/DESY/KEK)

• Near term (May/June) program and schedule
• FONT Queen Mary 5/25-6/4
• Cavity BPMs UCL 5/25-6/4
• Laserwire Royal Holloway 5/20-6/4
• Optical Anchor Oxford 5/26-6/2
• Ring Dynamics LBL 5/17-5/21
• High speed kickers DESY/LLNL 5/17-5/21
• About 30 non-KEK staff (2 from ILC-SLAC)
• Will use about 70 of ATF beam time in 2 ½ week
  period
• Next trip (12/2005) will be four/five weeks.

2
May/June 05 Milestones for each

• FONT First Final test with power amp drive
  signal tests OK! Latency tests OK!
• Cavity BPM Full tie-in with downstream set 25 /
  75 nm measured resolution over 5m ? 1e-8 angle
  measurement
• Laserwire First scans using existing Compton
  apparatus New beamline optics review and
  presentation of IP design
• Optical stabilization Design document review and
  presentation project planning w/KEK
• Coherent Synchrotron Radiation (DR) LHe
  Bolometer tests using LBL equipment
• Fast Kicker Test of 3 pulsers Kicker
  mini-workshop

3
JFY 2005 US/Japan Projects

• ATF2 cavity BPM electronics 50 each production
  complete by 03/2006. Cost estimate and project
  plan due this week
• Ring BPM upgrade Pilot project this year,
  proposal due May 12
• Shintake monitor shipment Visit this week by
  Sanuki (UoT) ship next week.
• Power supplies / Magnets / other Cherrill. To be
  signed off May 31 at KEK.
• Other? TBD May 31.

4
TTF - LOLA

• Very successful first run
• First results presented April 12
  http//commissioning2005.desy.de/
• Zeuthen ICFA XFEL Commissioning Workshop
• SLAC visit 04/04 to 22/04
• 2 ½ ILC-SLAC staff for the 2 week interval
• Fantastic images of CSR micro-bunching
  instability
• importance of full imaging monitor

5
Transverse deflecting structure to measure
longitudinal profile

• Kicker used to select single bunch out of 1MHz
  bunch train
• Deflecting cavity pulse 1 microsecond only
  streaks selected bunch
• In principal, resolution is (unstreaked spot size
  / maximum streak rate)

6
Unstreaked, vs. Streaked Spots
1 picosecond
Power 4.8MW, corresponding to 4.5fs/pixel
7
Beam without and with BC 3 (second bunch
compressor)
13 femtosecond FWHM spike!
1 picosecond
1 picosecond
Scans at high power 16MW
8
More Complex Spots with BC3 Off
1 picosecond
1 picosecond
Double spike without BC3
Ugly spot, BC3 off
9
LOLA - Possible Upgrades

• Better RF diagnostics
• accurate power measurements over gt30dB dynamic
• Improved phase measurement relative to beam or RF
• Automated Operation (software).
• phase feedback to center image on screen
• Automated focusing on screen
• Automated calibration, and unstreaked acquisition
• Improved RF phase stability
• Higher spatial and intensity resolution camera,
  with larger screen.
• Low frame rate OK should be able to get 4000 X
  4000 X 12 bit resolution (photographic camera)
• Modify optics
• Completely parasitic operation requires good
  configuration control
• Higher beta function in LOLA better resolution
  but stability problem
• Energy dispersion in perpendicular direction
• Large project, but information would be very
  interesting

10
TTF (2)

• Gen 2 HOM readout tested April 2005
• Success
• Data analysis next few weeks
• micron resolution (much better in principle)
• ACC 4/5 alignment
• Dual line narrow band system
• Written proposal for 40 channel system due this
  week
• To be submitted to SLAC, DESY and Saclay

11
Kicker Replacement

• Status
• Magnet tested April 22 impedance not ok.
• Further checks this week modification next week.
• Magnet is critical path
• Pulser mods to be completed this week
• 6 cable testing next week
• Long pulse testing next month
• Isolation choke rework needed
• (LLNL) to begin this week?

12
Kicker Replacement - May / June Schedule and
Milestones

• Project review May 13
• Skew correction evaluation (Woodley/Nelson)
• Short pulse testing complete May 20
• Long pulse testing complete June 15
• Ship July 15
• Installation ( 2 ILC-SLAC staff, 2 PSD) late
  September (before Nanobeams meeting)

13
PEP II

• LER XSR
• Images seen April 20
• (CIT, AD-SLAC)
• Commissioning underway
• LER BBA
• All hardware tested and online
• BBA shifts soon