Overview

1
Overview
BNL SNS Diagnostics Status/Handoff Meeting

• Peter Cameron

February 5-6, 2004
2
Outline

• Comments on the Agenda
• Summary and Conclusions
• Response to March 2003 FDR
• ASAC and DOE Review updates
• Important Dates
• General Status, Budget, Schedule
• System-by-System Status, Budget, Schedule
• More about Handoff
• Summary and Conclusions

3
Agenda
4
Summary and Conclusions

• FY03 commitments - all major purchases have been
  placed, except
• End Game Plan - funding for IPM magnets,
  Beam-in-Gap kicker pulsers, and Incoherent Tune
  kicker amplifiers moved from FY03 to FY05.
• Unofficial End game possible delay of IPM
  digitizer purchase (180K), delay of part of
  rackmount PC purchase (70K).
• During FDR, we listed among our concerns that a
  possible sleeper was the noise environment.
  Sleeper is now awake in the BCM system.
• Beamline hardware/vacuum envelope
• HEBT complete and delivered (except Linac and
  Injection Dump WS for LANL)
• All Ring and RTBT hardware in detailing/checking/f
  abrication.
• DAQ/Electronics - Critical systems (as defined by
  Diagnostics Review Committee and ORNL
  AP/Diagnostics) are BLM (VME-based), BCM
  (PC-based), and BPM (PC-based)
• BLM installed and commissioned for DTL
• BCM delivered, mysterious front end failures
• BPM first article electronics (Baseband and RF)
  are in-house at BNL
• BNL version of PCI Interface/timing decoder is
  in-house and at ORNL
• We anticipate no difficulties in meeting schedule
  for critical systems.
• Budget trend in the most mature systems (BLM,
  BCM) is disturbing
• Major concerns are handoff (DOE Review action
  item), BCM failures, spares

5
General Response to the Mar 03 FDR Report

• All general recommendations were directed at
  handoff
• The work effort has followed recommended
  priorities
• BLM, BCM, BPM, VFM, IPM, e-detect, Tune/BIG/Halo
• The recommended 3 FTE increase in staffing in
  ORNL Diagnostics has not happened (and will not?)
  
• Recommended MOA to extend BNL expertise into
  commissioning has not been implemented
• Perception at BNL is that there has been no real
  progress on handoff beyond prioritization

6
Outline

• Comments on the Agenda
• Summary and Conclusions
• Response to March 2003 FDR
• ASAC and DOE Review updates
• Important Dates
• General Status, Budget, Schedule
• System-by-System Status, Budget, Schedule
• More about Handoff
• Summary and Conclusions

7
ASAC and DOE Review Updates

• ASAC March 03
• Potential significant shortfalls include
  installing and commissioning diagnostics. SNS
  management should increase staff when needed to
  avoid schedule slippage or loss of morale.
• Include resonant quadrupole pickup
• DOE May 03
• Positive laser wire results - promote BIG and
  bunch shape monitor
• Present handoff/commissioning plan at next DOE
  Review
• Reduced set of Diagnostics for initial
  commissioning
• End Game plan - funding for IPM magnets, BIG
  pulser, and incoherent tune kicker amplifiers
  moved to FY05 (or beyond?)
• ASAC September 03 - no presentation, request for
  presentation on Ring Diagnostics at the next ASAC
• DOE November 03
• Consider ways to supplement staff of SNS
  Diagnostics group
• Focus on BLM, BCM, BPM, VFM (no mention of wires)

8
DOE Review(s) Action Item(s) - Handoff

• Action Item from Nov 02 and May 03 DOE Reviews
• Funding (2M) for installation support and
  documentation was transferred from BNL
  Diagnostics budget to ORNL 2 years ago
• This money was used at ORNL to fund staffing of
  the Diagnostics Group
• Agreement at that time was
• ORNL will be responsible for documentation, will
  provide system specialists one manweek/month at
  BNL starting ASAP.
• Assembly and Test will be accomplished at BNL
  (except BLM)
• ORNL responsible for Installation, System
  Integration, Documentation, Commissioning
  (requires early ID of BNL support requirements)
• Acceptance criteria The delivered components
  must meet the requirements of the final design
  review.
• BUT The resources needed to fulfill the
  responsibilities of this agreement have not been
  (and, according to the Project Office, will not
  be) made available to the ORNL Diagnostics Group

9
Handoff from BNL Perspective

• Deliver the Critical Systems (as defined by
  Diagnostics Review Committee and ORNL
  AP/Diagnostics) BCM, BLM, BPM, VFM
• Support Installation and Commissioning of
  Critical Systems
• This is not presently funded in the BNL
  Diagnostics budget
• Direction from ORNL Diagnostics is to reduce
  scope of non-critical systems to fund handoff
• Reduction of Scope - first obvious choice is
  End-Game hardware (Beam-in-Gap kicker pulsers,
  Incoherent Tune kicker amplifiers,)
• Request from ORNL is to have additional BNL
  manpower available at ORNL in FY05 and FY06, but
• BNL funding profile ends in FY05
• Non-permanent relocation to ORNL represents
  personal and professional hardship to affected
  members of BNL Diagnostics team
• No clear solution in hand

10
Outline

• Comments on the Agenda
• Summary and Conclusions
• Response to March 2003 FDR
• ASAC and DOE Review updates
• Important Dates
• General Status, Budget, Schedule
• System-by-System Status, Budget, Schedule
• More about Handoff
• Summary and Conclusions

11
Important Dates

• Jul 03 - HEBT beamline hardware delivery
  completed
• Jul 03 - DTL tank 1 commissioning - BCM and BLM
• Apr 04 - DTL tank 3 commissioning BCM, BLM (RF
  BPM)
• Jul 04 - Ring and RTBT beamline hardware
  complete
• Mar to May 05
• beam to linac dump
• BCM, BLM (RF BPM)
• Jul to Nov 05
• beam to RTBT dump
• BCM, BLM, BPM,
• VFM, coherent tune
• Feb 06 - beam to target

12
Beamline Hardware Progress
13
Electronics Progress
14
Budget
15
Outline

• Comments on the Agenda
• Summary and Conclusions
• Response to March 2003 FDR
• ASAC and DOE Review updates
• Important Dates
• General Status, Budget, Schedule
• System-by-System Status, Budget, Schedule
• More about Handoff
• Summary and Conclusions

16
BLM Status Richard Witkover

• Budget - 294K burdened
• Beyond baseline
• new ion chamber - development, higher bottle
  cost
• additional ion chambers in Ring, linac
• neutron detectors - HVPS and electronics
• MPS interface
• Successful commissioning for DTL tank one
• handoff - SNS Controls EPICS configuration
  crashed (all) VME crates, BLM not brought back up
• handoff - perception at ORNL that BLM didnt work

17
LabVIEW Template Chris Degen

• creation of Wim Blokland
• major tool for easing handoff
• original plan was to have each system specialist
  master the template
• practical reality is that Chris Degen will be
  the template specialist, will guide cognizant
  engineers
• all systems except BLM (which is in VME) use the
  template

18
PCI Interface/Timing Decoder Joe Mead

• Original plan was to use LANL interface
• Issues with delivery and support (LANL is off
  the project next month) drove the decision to
  develop in-house design
• Improvements to the LANL design
• replaced fifos with SRAM - 50K savings
• replaced one-time with programmable gate array
  flexibility
• added timing decoder to gate array - 100K
  savings plus a slot
• single board for baseband BPM (LANL design has 4
  boards)
• Version 2 is under test focus on timing
  decoder
• This board will probably become project-wide
  decoder

19
BCM Status

• Budget - 312K burdened
• Beyond baseline
• ring toroid vendor error 120K
• differential current measurement 72K
• timing generator for MEBT commissioning 30K
• in-house PCI/timing decoder development
• mysterious electronics failures - commissioning
  support 24K handoff
• Mysterious electronics failures - Tennessee
  mountain air? (best theory)
• No failures at Berkeley/BNL in 2 years of
  continuous operation
• First ORNL failure - input resistor, one time
  only
• Succeeding failures - TI and AD amplifiers,
  proven performers
• handoff 3 and 10 week shelf times for tank 1,
  then panic
• Wim and his template saved the day (FBCM -
  Saeeds suggestion)
• Internal Review at BNL in early January - no
  random changes
• ready for full production (board stuffing) since
  June
• The Plan - continue testing thru tank 3, then
  decision

20
Fast DAQ Systems

• fast Acqiris digitizer in PC
• DP 235 - 1GS/s, 500MHz BW, 8 bits
• Slightly expensive 9K for 2ch board in qty 20
• Fast BCM
• 100 MHz analog output from all BCM IFEs
• Original purpose - characterization of bunch
  edges, abort gap
• Requires timing decoder card, no calibration,
  only 8 bits, no gate array for pre-processing,
  too much data(?),
• Fast BLM (and BIG/Halo)
• PMTs in 18 locations, testing in Linac
• Electron Detectors
• Modified ANL style detectors at five locations in
  SNS Ring
• Laser Wire - the saving grace for BCM

21
BCM Fallback Kudos to ORNL/Wim
22
Beam Current Monitor
23
BPM Status

• Budget - 14K burdened
• Beyond baseline
• detail drawings and 2 PUEs for CCL
• 17 PUEs for HEBT
• in-house, then Bergoz (delivery problems due to
  RF), now in-house
• RF section for all Ring and RTBT
• in-house PCI/timing decoder development
• beam-based alignment
• Work has been seriously impeded by BCM failures
• manpower diverted
• hesitancy to proceed until BCM problem is
  understood

24
Ring and RTBT BPM Electronics

• Calibration - via S21 thru the PUE, also
  Beam-based offset determination
• IFE Electronics in Third Iteration
• Dual AFE (baseband shown below 400MHz RF) for
  first turn capability, incoherent tune
  measurement, easier calibration,
• Dynamic range dual AFE, protected amp, gain
  switching
• PCI Interface evolved from LANL design - proven
  with MEBT, DTL BCMs
• Digital section is very similar to BCM - again
  proven at MEBT
• Does not share critical analog components with
  BCM AFE

25
RF BPM Electronics
26
Video Foil Monitor Status

• Budget - 90K burdened
• Two locations primary and secondary stripping
  foils
• Beyond baseline
• detailed design for electron catcher
  camera/cubby
• fluorescent screen for low intensity operation,
  position and profile measurements
• Camera and DAQ for electron catcher not in
  baseline

27
IPM Status

• Budget - 272K burdened
• Beyond baseline
• cold electron calibration source
• increased aperture to improve S/N
• luminescence monitor studies when space charge
  was still an issue ports included in IPM vacuum
  chamber
• electron detectors and their DAQ
• Magnets moved to FY05 official end game
• Digitizers moved to FY05 unofficial end game,
  two boards (of 16) to be purchased so that
  development work can continue

28
IPM - Permanent Magnet Vacuum Chamber
29
WS Status

• Budget - 91K burdened
• Beyond baseline
• six MEBT carbon wire scanners
• laser wire development effort at BNL
• two MEBT laser wires
• linac, injection, and rtbt dump vacuum chambers
• all chambers enlarged at request of LANL/ORNL to
  keep forks out of beampipe aperture
• ports for laser wire and vacuum chambers for
  magnets/electron detectors provided all HEBT
• Remaining BNL responsibility is vacuum chambers
  only, proceeding on schedule

30
Incoherent Tune Status

• Budget - 14K burdened
• Beyond baseline
• resonant dipole pickup, kicker, and amplifiers
• resonant quadrupole pickup, kicker, and
  amplifiers
• motion control for pickups
• damper kickers at request of ORNL AP group
• Original concept was to measure tune of injected
  bunch in the space charge field of the
  accumulated bunch separate WBS for incoherent
  tune did not exist
• Resonant quadrupole pickup used in RHIC 2003
  (first application of this concept), spectral
  signature of envelope oscillation seen. For RHIC
  2004 pickup modified to 20 degree striplines,
  resonant network just connected, looking at
  spectra asap.
• Caution from Prof. Hoffman (Halo 2003) on
  interpretation of Schottky spectra in
  space-charge dominated beams

31
Coherent Tune/BIG/Halo Status

• Budget - 149K burdened
• Beyond baseline
• BIG Kicker
• BIG Pulser
• Ring Scrapers and motion control
• Original design was a current transformer, WBS
  was BIG only
• Prototype transformers were built, combination
  of dynamic range and bandwidth was insurmountable
• Discussion of need for gap cleaning arose in BNL
  AP group, decision was made to build gap cleaner
  and look at losses at collimators
• Concerns about ability to see signal at
  collimators, coupled with understanding of
  space-charge driven envelope resonance at PSR,
  led to inclusion of scrapers for halo monitoring
• Emission current monitoring added to scrapers at
  ORNL request
• Coherent tune was moved to this WBS

32
Spares Plan - BLM only

• Reasonable spares cost 400K, PCR turned down
  by Project Office
• Second iteration 200K, again turned down by
  Project Office
• Not possible to do spares for less than this our
  concern is that if we agree to a partial spares
  PCR, we open ourselves to failure and criticism
• Solution spares for most critical system only
• PCR submitted to Project Office for 100K for
  BLM system not yet approved
• Remaining concerns
• this approach is not cost effective the time to
  build spares is when youre in production for the
  system
• given manpower/money situation, spares unlikely
  before beam

33
More on Handoff

• Basic Plan is sound - prioritize BLM, BCM, BPM,
  VFM (and wires)
• BLM and BCM (and wires) will be brought to full
  operational readiness of necessity during linac
  commissioning
• BPM will be parasitically brought to readiness
  during the same time
• Hardware and software similarities between BCM
  and BPM
• VFM will require additional attention (system
  specialist shared with BLM, HEBT and Ring
  Scrapers, Stripper Foil)
• Concern remains regarding ONRL manpower, whether
  they can give needed attention to systems to
  complete handoff
• We have been delivering BCMs for over two years,
  but Craig Dawsons presence is still essential to
  turn on the system
• EPICS configuration problem killed the BLM during
  tank 1 commissioning, with no BNL presence it was
  not brought back up.
• There is no money in the BNL budget to support
  presence at ORNL
• The plan is sound, but manpower and money to make
  it work are not yet available. It requires
  additional manpower at ORNL, and additional
  travel money at BNL

34
Summary and Conclusions

• FY03 commitments - all major purchases have been
  placed, except
• End Game Plan - funding for IPM magnets,
  Beam-in-Gap kicker pulsers, and Incoherent Tune
  kicker amplifiers moved from FY03 to FY05.
• Unofficial End game possible delay of IPM
  digitizer purchase (180K), delay of part of
  rackmount PC purchase (70K).
• During FDR, we listed among our concerns that a
  possible sleeper was the noise environment.
  Sleeper is now awake in the BCM system.
• Beamline hardware/vacuum envelope
• HEBT complete and delivered (except Linac and
  Injection Dump WS for LANL)
• All Ring and RTBT hardware in detailing/checking/f
  abrication.
• DAQ/Electronics - Critical systems (as defined by
  Diagnostics Review Committee and ORNL
  AP/Diagnostics) are BLM (VME-based), BCM
  (PC-based), and BPM (PC-based)
• BLM installed and commissioned for DTL
• BCM delivered, mysterious front end failures
• BPM first article electronics (Baseband and RF)
  are in-house at BNL
• BNL version of PCI Interface/timing decoder is
  in-house and at ORNL
• We anticipate no difficulties in meeting schedule
  for critical systems.
• Budget trend in the most mature systems (BLM,
  BCM) is disturbing
• Major concerns are handoff (DOE Review action
  item), BCM failures, spares

35
Backup Material

• Following slides are backup material

36
BNL Diagnostics Requirements Table
37
HEBT Beam Instrumentation
38
SNS Ring Instrumentation
39
RTBT Beam Instrumentation