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. V Chohan

2. BeamDiagnostics current of Activities (non-exhaustive) ‘Snapshot’ • PSB Wire Scanners • Normalizers for Closed Orbit M’ment 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-->AD --> CTF3 & LEIR } • LHC DC-Beam Current Transformer • AD M-shaped excitation for BTF based ramp tune m’ments • East Hall • LEIR work estimations/ projections /proposals • CLIC study related activities ( R&D) • LaserWS, x-ray Position Sensitive Detection(Medical world.. V Chohan

3. BeamDiagnostics 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….. V Chohan

4. BeamDiagnostics - 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 80’s , 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.. V Chohan

5. Controls Architecture, where we fit our Diagnostics Systems & Who does what….. V Chohan

6. Example of DSP System Development & Environment - also applies to other complex systems like PSB WireScanner V Chohan

7. DSP Modules in VME - PS Div Experience • 1989 THEMIS Board under OS9 AAC Perf.check(AR Grp) • 1989DataGeneral VASP with C25PS Tunes(Baconnier Grp) • 1990 CO PS-SL LYNX-OS & UNWORKABILITY with THEMIS • 1991 ( BD Group Formation - regrouping of staff - ACH, Johnston etc) AAC M’ment 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 } • 1997Success with 1 Ring Tests in PSB with DBV96 ( 1 m’ment every 15ms ) before new RF • 1999 All 4 PSB Rings MLPX m’ments every 5 ms with 500V pulser • 1999 PENTEK DRX BoardAD Tunes, Intensity, beam sizes(BD Grp) V Chohan

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. V Chohan

9. People, Work, Priorities vs. Projects: { LEIR for CERN commitment to LHC, CTF3-Further Stages , etc } Review PRIORITY SETTING becomes very Important : PRIORITY IN TERMS OF NEED & FINANCIAL PROVISION:new DEVICES - Example : PU’s ( AND CORRECTORS ? ) costs vs BENEFIT PRIORITY IN TERMS OF MANPOWER USAGE with clear understanding that importance of one would delay another Pivotal role V Chohan

10. Diagnostics Systems - a GLIMPSE on what next on important issues:{ opening a Pandora’s Box or A can of worms ? } Review • Controls + VME Hardware getting old/ Companies go bankrupt, disappear, meaning ----> • 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 } V Chohan

11. BeamDiagnostics - Some Current Topics…per machine or facility • Linac2: • Consolidation of Measurement lines Systems continued…….. • Linac3: • Multi-slit Emittance M’ment - 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.Tanke’s work? .. Responsibility ? C.Hill ? - one should be doing good housekeeping by standardizing with Isolde ‘experience’ if that’s 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 V Chohan

12. BeamDiagnostics - Some Current Topics…per 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 …. • ECM’s & WCM’s & TRA [ Current Monitors & transformer] • Timing issues.. • Wire Beam Scanners • Sem-grids • MTV’s • Slits SLH/SLV’s • Transition Cerenkov monitors (TCMs) and Synch. Radiation light ports (MSRs) • Optical Lines Mods to Streak Camera from TCM’s MSR’s • Special pickups ( tune M’ment in EPA ). • CTF3 : ‘Further Phases’ work : • PU Design, 10 GHz WCM’s ... • Thermal dissipation in OTR Study…. • Etc.. V Chohan

13. BeamDiagnostics - Some Current Topics…per 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 M’ment: ORGANIZATIONAL ISSUE • BTU30 repair and auto gain setting.. Machine Access needed • Image DGTZ for Inj & Ej screens: Feasible - V Chohan

14. BeamDiagnostics - Some Current Topics…per 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? ] V Chohan

15. BeamDiagnostics - Some Current Topics…per machine or facility • PS: • Flying Wire in sections (H)54,64 (V)75,85: • M’ment 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 m’ments 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? V Chohan

16. BeamDiagnostics - Some Current Topics…per 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 PU’s 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 WCM’s : r.f. PLL controls vs observation Use [ ORGANISATIONAL ISSUE ] V Chohan

17. BeamDiagnostics - Some Current Topics…per machine or facility • PS: • Mean Radial Position evaluation from CODD System: • NORMAL CODD m’ments are rejected when this option is chosen - it is one or the other - MRP m’ments 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 ] • h=21 high energy measurements: • Measurements WORK - however at the limit because PLL VCO limits ; Originally was h=20 , now extended - { very large dynamic range h=1 to h=20 } V Chohan