AMO Commissioning Plans

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AMO Commissioning Plans

• John Bozek
• June 9, 2009

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So many parts, so little time

• Have a short time to prepare the instrumentation
  for user operations
• KB optics to focus to 1 um
• 6 electron spectrometers each with 8 HV PSs
• Two ion spectrometers
• Laser (3 wavelengths) to overlap with FEL beam in
  two different locations
• Three six-axes remote controlled stands coupled
  through thin-walled bellows
• three separate gas supply systems
• X-ray beam that can damage when focused

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Schedule Constraints

• Beam first available in Aug 09, limited by
• installation of instrumentation into hutch during
  June
• connection of all controls and data acquistion
  cables
• commissioning of 3 FEE soft x-ray mirrors
• certification of radiation safety and personnel
  protection systems for NEH operations
• Lasing of LCLS, although some work can be done
  with spontaneous radiation

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Schedule Constraints - 2

• Begin user operations in FY09
• Began process gt1yr ago with user outreach, first
  call for proposals, proposal evaluation, user
  workshops, etc
• Selected 11 proposals for 1st run in Sept Dec
  2009 with first 7 using the LCLS - AMO
  instrumentation
• Constraints consistent with a mid-September start
  of user run

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Operations Schedule
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AMO Commissioning Goals

• Verify proper operation of all equipment
  necessary to carry out FY09 research
• Include adequate time for requisite debugging and
  modifications
• Both hardware and controls and data acquisition
  need to be checked out
• Determine base line performance of spectrometers
  and diagnostics equipment
• Resolution of spectrometers, sensitivity of
  diagnostics, signal rates as fcn of sample
  pressure

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AMO Commissioning Goals - 2

• Gain experience with equipment, controls and LCLS
  FEL to be able to best support User Operations
• Beamtime is extremely valuable need to ensure
  that users get greatest benefit from their
  scheduled beamtime
• Conduct some instrumental experiments to benefit
  the XFEL community for development of future
  diagnostics, methods, etc.

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Commissioning Tasks

• Beam through entire system
• Align HFP chamber to beam
• Collect images of beam on diff pumping YAG
• Collect images of beam on beam viewing paddle
• Align Diagnostics chamber to beam
• Collect images of beam on upstream diff pumping
  YAG
• Collect images of beam on downstream HiRes beam
  screen
• Align laser to beam - rough
• FEL beam OFF
• Insert mirror
• Align beam, collecting images as necessary
• Remove mirror before beam back ON
• Pulse energy monitor
• Offline testing of pressure, magnet current,
  detector voltages, data acq
• Setup with appropriate pressure observe signal
• Correlate signal with FEE pulse energy monitors
• Attenuate beam with gas attenuator verify
  operation
• Vary pressure and tabulate response
• Shutter operation

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Commissioning Tasks - 2

• At first estimate, 1100 hrs of beamtime required
  for this commissioning list
• But only 720 hours of time
• Need to optimize list durations
• Need to aggressively schedule commissioning time
• Requires 24 hours operation
• Multiple people required to run/maintain 24/7

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Human Resources

• Commissioning will be led by AMO instrument
  scientists John Bozek and Christoph Bostedt
• with support from design engineers Jean Charles
  Castagna and Michael Holmes
• and controls group led by Remi Machet and data
  acquisition group led by Christopher OGrady
• And assistance from other LUSI instrument science
  staff (although they have day jobs)
• Need 24/7 coverage with sufficient energy to
  interpret results and make changes
• Roll right into user support for 4 months

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Human Resources 2

• Need many more people ideally three per shift
  with three shifts per day
• Reached out to users to ask for commitment for
  them to send someone useful (i.e. not a green
  graduate student) for a period at least 3 weeks
• Enormously positive response from all corners
• LCLS also gains by having experienced users in
  first experimental
• Requires active management by meschedule to be
  proposed shortly

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Human Resources 3

• Estimate 9-12 people needed per week
• LCLS scientists average 3/week
• PULSE/Stanford students 2/week
• Still need 4-10 people/week say 6
• Total of 36 man weeks required
• Cost per person
• 500 for airfare
• 75 per night 59 per diem 800/week
• Total budget required 46.8K

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Human Resources 4

• Other sources of human resources include
• 3-way collaboration between x-ray FELS
• Interest in sending an x-ray wavefront sensor
  (and people) from Germany very useful for
  optimizing performance of KB optics
• PRP assigned three proposals to commissioning
  period (each come with people)
• Characterization of highly focused x-ray beams
• Materials compatibility
• Gas monitor detector cross calibration

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Alignment

• 1st step - need to align chamber to beam
• Be able to switch from non-KB to KB operation

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Alignment 2

• Numerous 5mm apertures to get through
• Fixed apertures will be prealigned
• All include YAG preceding and following apertures

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Alignment 3

• Example of alignment tools
• Use reproducibility of stepper motor positioned
  tables

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Spectrometers

• Initially commission spectrometers and
  diagnostics without focusing to reduce riskof
  damage

• Pulsed gas jet
• Ion TOF spectro.
• 5x electron TOFs
• Ion imaging spectrometer

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Diagnostics

• Initially pulse energy monitor and beam screens
  available
• Magnetic bottle spectrometer will arrive in July

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Laser

• Not available until August due to Laser Safety
  System issues
• Laser useful for signal based commissioning of
  spectrometers in absence of FEL beam
• First experiments do not require coincident laser
• Like to try timing diagnostic (sidebands) with
  laser and magnetic bottle during commissiong if
  possible

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Laser 2

• Several mirrors available although changes
  require venting chamber

Adjustable mirror assy
Adjustment access flange
(HFP chamber shown)
To interaction region of HFP or Diagnostics
Laser mirror
Upstream diff. pumping
Laser entry
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Focusing Optics

• More time spent on figuring measurement tool
  (LTP) at Berkeley is very valuable since want to
  change focal length just in time delivery,
  currently scheduled for Aug 3

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DAQ System

• Photon Control Data Systems designing
  building control and data acquisition system and
  working with SCCS for data storage

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Control Room
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AMO Commissioning Schedule

• Need to have an adaptable plan to take advantage
  of opportunities as they arise

• Weeks 1 2 Alignment, ion spectrometer, gas jet
• Week 3 electron spectrometers, pulsed extraction
• Week 3 focusing optics, velocity map imaging
  spectrometer
• Week 5 pulse energy, damage, magnetic bottle
• Week 6 laser overlap, ion electron
  spectrometers

• Ready for first users in September!

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Controls

• Using EPICS for controls modular system thats
  easily controlled using various front-ends
• Here they plan to use Python-QT to write GUI
  (Ive done it using MEDM, C code and LabWindows

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Data Export
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Data Management Architecture