Beam Diagnostics Overview

1
Beam Diagnostics Overview

• Work snapshot this year
• Aims
• General Context
• appreciation,where we fit
• examples DSP, WS
• Work, People, Priorities
• Glimpse of certain Worries
• Tour of Machines /Facilities
• AD
• CTF3
• ISOLDE
• Linacs
• PSB
• PS Exp Areas
• New Orbit System for PS
• A.O.B.

2
Beam Diagnostics current of Activities
(non-exhaustive)
Snapshot

• PSB Wire Scanners
• Normalizers for Closed Orbit Mment in PS
• Isolde Instrumentation Integration
• PS new-CT studies Development with 500 MHz
  Digitizers
• OTR development/Tests
• Video Image Digitization / Linux PC/DSC etc
  (CTF3, OTR..
• CTF3 Prelim Initial phase Developments for
  startup 17/9/01
• N.B. - new projects are essential for our staff
• D067--gtAD --gt CTF3 LEIR
• LHC DC-Beam Current Transformer
• AD M-shaped excitation for BTF based ramp tune
  mments
• East Hall
• LEIR work estimations/ projections /proposals
• CLIC study related activities ( RD)
• LaserWS, x-ray Position Sensitive
  Detection(Medical world..

3
Beam Diagnostics Overall Aims

• Maintain Essential Equipment for Current
  Operational Use
• Aim to React and Respond to URGENT Needs Fast
  including for Divisional Projects
• Recent Examples ( non-exhaustive)
• Digitization for TOF Video screens images , in
  TT2
• OTR Development for PS/SPS High Energy Coupling
  Checks
• 100K Turns in PS Measurement System for X - X
  Studies
• Launch rationalisation Activities in light of
  given manpower scenarios and constraints and
  aiming to go forward.examples
• PS Closed orbit vs trajectory CODD,
• review process launched July 2001..

4
Beam Diagnostics - an appreciation and flavour
of important issues
Review

• WHAT DO DIAGNOSTICS SYSTEMS INVOLVE HOW THEY
  FIT IN THE ENVIRONMENT ?
• In our complex of Accelerators, since late 80s ,
  systems are NOMORE pieces of hardware only -
  software issues and integration to higher complex
  levels have become part parcel of a given
  measurement system
• The 1991 model of Systems development and
  commissioning - System Specific software,
  Infrastructure/Architecture , Application Level
• One must appreciate complexity of certain
  measurement systems as well as (a) general
  integration issues , (b) dependency on non-BD
  factors, (c) shutdowns, (d) history .
• Just two Examples
• DSP Usage development cycle AAC, PS, PSB ,
  AD(LEIR?)
• Wire Scanner etc..

5
Controls Architecture, where we fit our
Diagnostics Systems Who does what..
6
Example of DSP System Development Environment -
also applies to other complex systems like PSB
WireScanner
7
DSP Modules in VME - PS Div Experience

• 1989 THEMIS Board under OS9 AAC
  Perf.check(AR Grp)
• 1989 DataGeneral VASP with C25 PS
  Tunes(Baconnier Grp)
• 1990 CO PS-SL LYNX-OS UNWORKABILITY with
  THEMIS
• 1991 ( BD Group Formation -
  regrouping of staff - ACH, Johnston
• etc) AAC
  Mment importance diminishes - Collider end
• LEAR too
  foreseen )
• 1991 DATAGeneral VASP with C25 PSB
  Tunes(BD Grp)
• 1992 DataGeneral goes bankrupt / bust
• 1993 PS Tunes WORK with VASP Board BUT, decide
  to abandon
• VASP buy
  DataBeta DBV96 with Motorola DSPfor PSB Tunes
• End-1993 Big Bang tests with VASP on
  PSB
• 1997 Success with 1 Ring Tests in PSB with DBV96
  ( 1 mment
• every 15ms
  ) before new RF
• 1999 All 4 PSB Rings MLPX mments every 5 ms with
  500V pulser
• 1999 PENTEK DRX Board AD Tunes,
  Intensity, beam sizes(BD Grp)

8
People, Work, Priorities vs. Projects LEIR
for CERN commitment to LHC, CTF3-Further Stages
, etc
Review

• Positive point is that for some systems we have
  new young people who lack experience but have
  the capacity to develop knowledge of OLD SYSTEM
  build NEW systems BUT the INTEGRATION ASPECTS
  WOULD BE AN ISSUE OF IMPORTANCE
• EXPERIENCED staff departures in recent years and
  next DWilliams, MLeGras ,JOlsfors, CCarter,
  OMarqversen, GMartini, LMerard ,..
• Making the aspects of maintenance /or system
  extension/improvements very difficult
• HENCE,often for many systems one can only
  propose extension or copies of existing
  similar systems the associated methodology of
  access even though the physical sensors devices
  may have substantially new hardware component in
  them.
  

9
People, Work, Priorities vs. Projects LEIR
for CERN commitment to LHC, CTF3-Further Stages
, etc
Review

• 
  becomes very Important
• PRIORITY IN TERMS OF NEED FINANCIAL PROVISION
  new DEVICES - Example PUs ( AND CORRECTORS ?
  ) costs vs BENEFIT
• PRIORITY IN TERMS OF MANPOWER USAGE with clear
  understanding that importance of one would delay
  another

PRIORITY SETTING
Pivotal role
10
Diagnostics Systems - a GLIMPSE on what next
on important issues opening a Pandoras Box
or A can of worms ?
Review

• Controls VME Hardware getting old/ Companies go
  bankrupt, disappear, meaning ----gt
• Do we have Spares ? If not what do we do ?
• New similar hardware(if stay in VME), market
  study, purchase, development cycle ( Drivers,
  installation, tests, shutdowns.. .At least 2
  yrs cycle from date of purchase ) .
• Examples
• DL515 DL7515 BT BTP Pickups, CTF3 Inj etc
• STR751/755 L3 L3 to PSB trafos, L2/L3
  Measur.Line PS Inj studies Semgrids MSH ,
  BLVDs
• ELTEC video DGTZ
• PCI systems Integration (Image DGTZ, 500MHz
  Acqiris )
• Standardization or freezing vs. progress
• Example Tune Measurement systems, Method used
  and DSP AD to LEIR to PS PSB..?
• Change the 1991 Model to Vertical Slice ? How ?
  manpower
• Keeping in-house knowledge outsource ?
  Feasibility?
• H/W - S/W - Timing intimate interaction

11
Beam Diagnostics - Some Current Topicsper
machine or facility

• Linac2
• Consolidation of Measurement lines Systems
  continued..
• Linac3
• Multi-slit Emittance Mment - Important for
  non-Pb Species(LHC) Revival of Massimo Crescenti
  s program?? ( issues of H/W, S/W, Applic.,
  very old Frame Grabber, responsibility?
  PRIORITY SETTING
• Faraday Cup Electron Suppression ( ex-E.Tankes
  work? .. Responsibility ? C.Hill ? - one should
  be doing good housekeeping by standardizing with
  Isolde experience if thats the case , BD
  takes on more work !!
  Organizational Issue /needs discussion
• AD
• M-shaped beam excitation in BTF technique to
  measure Tunes on ramps URGENT PRIORITY FOR
  LEIR IMPLICATIONS
• new high sensitivity ( E7 pbars) trafo in extr
  lin , calibr., timing, etc
• ISOLDE
• Needle Wire Scanners, SemGrids, Faraday Cups .
  WORK continues

12
Beam Diagnostics - Some Current Topicsper
machine or facility

• CTF3 Preliminary phase shutdown work this year
  preparations Priority for 17Sept01 startup
  Major renewal / modification/ relocation/
• 
  reorganization exercise
• Pickups UMA
• Bessel Filters, amplifiers,RT-task, Timing
  issues. ( in absence of MLGras .
• ECMs WCMs TRA Current Monitors
  transformer
• Timing issues..
• Wire Beam Scanners
• Sem-grids
• MTVs
• Slits SLH/SLVs
• Transition Cerenkov monitors (TCMs) and Synch.
  Radiation light ports (MSRs)
• Optical Lines Mods to Streak Camera from TCMs
  MSRs
• Special pickups ( tune Mment in EPA ).
• CTF3 Further Phases work
• PU Design, 10 GHz WCMs ...
• Thermal dissipation in OTR Study.
• Etc..

13
Beam Diagnostics - Some Current Topicsper
machine or facility

• PSB
• Wire Scanners
• Half-Turn Pickup
• ORGANIZATIONAL ISSUE / Jose Sanchez- Gate Module,
  r f cage NIM cleanup etc.. Comblin, REQUEST
  coordination..
• Beam Transfer Function Mment ORGANIZATIONAL
  ISSUE
• BTU30 repair and auto gain setting.. Machine
  Access needed
• Image DGTZ for Inj Ej screens Feasible -

14
Beam Diagnostics - Some Current Topicsper
machine or facility

• PSB
• Wire Scanners Details
• Major Project ongoing for these 8 systems and at
  this stage , too early to say how far we will get
  this year. Complex micro-coded Motor Control,
  new ADC-VD72/INCAA-2MHz (not ICV122) , prototype
  electronics board, RT-task etc.. Delayed on the
  whole by 1 year. Manpower problem(Olsfors..)
  history 1 PS type device was installed for test
  purposes down to 50MeV with 2 regimes extr.
  Photomultipliers for secondaries above 200 MeV
  secondary emmission from wire for further down
  to 50 MeV
• One milestone is to check one system to work
  with beam before end of this year. If tests
  successful, the prototype extended for all 8
  systems
• Involves several persons in very significant
  manner with high priority
• Image DGTZ for Inj Ej screens Details
  Feasible -
• simplest, for tests use OTR test method
  needs iris control as well
• Definitive needs, priorities definitions
  with NvideoOS or we can continue PCI systems a
  la carte ( CTF3-Streak C., TT2-OTR,
  PRIORITY ISSUE ORGANIZATIONAL
• remember CCD cameras RADIATION Hardness
  - OTR uses semi-rad hard vidicon?

15
Beam Diagnostics - Some Current Topicsper
machine or facility

• PS
• Flying Wire in sections (H)54,64 (V)75,85
• Mment with TREV or Internal timing both possible
  , one or other poor operational applic pgm ?
  
• influence of beam loss Can DISTINGUISH
  secondaries from photomultipliers separately
  from wire current APPLICATION ISSUE
• Discrepancy in identical mments on same device
  ensure same good beam, dp/p, intensity,
  flattop etc check KPriestnall Uli
  Raich ..
• Sem-Fils TT2 ( 40 micron gold plated Tungsten
  wires)
• ( TT2 SemGrids are 3
  mm Tungsten strips)
• Is IN/OUT really needed in PPM ? - one can do
  without because leaving it in even for high
  intensity may be OK without affecting beam
  blowup?
• For Electron Cloud effect, improvements HAVE BEEN
  made, particularly with polarisation - but
  results not too positive ? Next steps?

16
Beam Diagnostics - Some Current Topicsper
machine or facility

• PS
• Q Measurement
• The present system was designed during 20 bunch
  era and is based on a half-a sine wave kick and
  so the phase of the kick was not too critical.
  Now, for LHC-era beams say with 4 bunches (which
  show much more unequal ampltd response) the
  kicker phase gets critical (even for Trev synch)
  with fine phase adjustments and so the
  recommendation is to do measurements with
  sufficient intensity and at least 4 equidistant
  bunches till we get opportunity to replace/renew
  the system - rectangular pulse like PSB ?, BTF
  technique ? What DSP?..etc PRIORITY
  ORGANIZATIONAL
• WCM03 WCM95 TT2 WideBand PUs 208, 228
• LIMITATIONS at High Intensity (nTOF CNGS) -
  Attenuators /power stages get burnt/blown up.
  BETTER PROTECTION IMPLEMENTED
• In TT2 difficult to understand ( Radiation? )
  what happens because extreme tests (upto 80V) in
  lab showed no adverse effect .. BETTER PROTECTION
  IMPLEMENTED
• USAGE conflicts on PS WCMs r.f. PLL controls
  vs observation Use
  ORGANISATIONAL ISSUE

17
Beam Diagnostics - Some Current Topicsper
machine or facility

• PS
• Mean Radial Position evaluation from CODD
  System
• NORMAL CODD mments are rejected when this
  option is chosen - it is one or the other - MRP
  mments done with interval of 5 ms
• CODD - Several operational points
• harmonic no sequencing now done directly from
  Beam Control Timing Modifications in Software
  in CODS done recently
• Vertical Scaling in Display Applic Program -
  ORGANISATIONAL ISSUE
• Gate, phase ,Base-line-Restitution Adjustments
• - procedure/ method JBelleman on WEB
  OR,
• - EM (CODS) property /modification approach
  feasible but needs S/W effort PRIORITY vs
  NORMALISER Closed Orbit
• Double-batch Injection Usage Procedure
  Available but complex , ELSE MODIFY S/W
  PRIORITY vs NORMALISER Closed Orbit
• h21 high energy measurements
• Measurements WORK - however at the limit because
  PLL VCO limits Originally was h20 , now
  extended - very large dynamic range h1 to h20