based on lars’ progress report of liu sps bi status of follow-up 13/10/2015lars k. jensen, v....

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Based on Lars’ progress report of

LIU SPS BI

Status of follow-up

13/10/2015 Lars K. Jensen, V. Kain

Lars K. Jensen BE/BI/SW 2

Upgrade transverse diagnostics (head-tail)• Request:

• Resolve coherent transverse position within individual LHC bunches• Both planes H/V at the same time• 1000 turn• >10 GHz sampling

• Proposed solution:• Electronics/software

• Purchase Guzik digitizer => done (spare system from LIU-PS TBD)• Provide FESA3 class and expert GUI ((T. Levens BI/QP) use as OP GUI, currently still

issue with connection to scope

• OP application (action OP-SPS)

• Later stage:• High bandwidth detectors (EO/CTF) (HL-LHC prototype)• Cross fingers for official Linux support (PCIe) ..

27/08/2015

Like to include connection to an instability trigger.This will need to be better defined.


Upgrade BGI• Request:

• Provide relative beam size measurements during SPS cycle (H/V)

• Proposed solution• Magnets:

• Some changes made during LS1 (3->2)• Need green light from OP-SPS to power

• Detectors:• Upgrade cage/MCP similar to LHC -> completed

• Electronics updated as LHC• Cabling issues solved however cameras believed to not withstand radiation levels

• Software• System commissioning started – BI expert specifications pending• New electronics for HV control being designed (2016?)

• Actions:• Understand/solve radiation issues (camera)• Commission system (BL/SW)

• Dedicated MD to be planned (magnets powered)• Decide next steps also in view of LSS5 (LS2)

27/08/2015

Found new location for 517 IPM:Proposal: between the Roman pots of UA9after QD519.


Upgrade orbit system (MOPOS)

• Problem• Maintenance of obsolete electronics (consolidation) with long coax cables

• LIU/OP requests• Acquisition modes a go-go (useful EDMS document)• Integrate interlocks: fast excursion and LSS4/LSS6 extraction bumps interlocking not very meaningful currently.

Large tolerances required of 2.5 mm. Should be 0.5 mm.

• Solutions• Replace old detectors -> Done during LS1• Tunnel electronics with ADC (rad-hardness) - Long coax cables -> fibres• New acquisition electronics (VFC) with two chains (single bunch/batches)

• Project status• Fibres:

• Infrastructure available in BA1,5,6 and shaft of BA4

• Cables:• All done in LSS1 and LSS6, all mini-crates in the tunnel

• Electronics:• 3 prototypes installed BA6 currently under tests• Rad-Hard front-end electronic under development - prototype expected end the year• Digital Acquisition board final prototype currently being done - production 2016-2017

• Actions• Determine radiation hardness of tunnel electronics (2017)• Assess performance of front-end electronics (2015/2016 – MD to be requested)• Produce electronics (tunnel and surface) and firmware/software• Investigate and implement interlock modes – if possible without need for external fast timing synchronisation• Publish EDMS document with software interfaces for each operational acquisition mode

27/08/2015


Upgrade wire-scanners• Request:

• Scans with 4 PS batches at 450 GeV in the SPS• BxB acquisition (@40MHz)• Improve precision with small / low-intensity beams: currently in absolute +/- 50 um uncertainty on sigma independent of

energy• Decrease dependency on settings (PM gain etc)• Both planes H/V at the same time: should be OK with new location proposal + up to 5 scans per cycle (minimum time

between scans: 1s).• Emittance accuracy 10% (absolute)

• Solutions:

• New mechanical design installed in SPS (LSS5)• Diamond as PM replacement (parallel)• Fibres to replace long cables

• Actions:

• 2015:• Provide electronics for movement and acquisition of profiles• Provide specifications for BI software• Assess performance with beam of scanner and diamond

• 2016:• Beam tests SPS with final electronics/software• Final detector and electronics design

• 2017->2018:• Production and test

• LS2:• Installation and commissioning (final locations to be specified) (OP-SPS / ABP)

27/08/2015

Have proposal for all scanner positions now:Keep 2 linear ones: 519, 416 (now at 517, 521)Keep old rot. ones: 519, 416Add new rot. ones: 519, 416


Upgrade Fast (Ring) BCT

• Request:• Provide BxB intensity = f(cycle-time)• Accuracy (p/b) = 5%

• Problems:• Position and bunch length dependence and limited analogue bandwidth (bunch cross-talk)

• Proposed solutions:• Detectors:

• Install BCTI(CT) or BCTW (being tested on LHC)• Installed in LSS3 (long cables) and LSS5 (bunch synchronisation)

• Electronics/software:• Commission Digital Integration (DI) system• Adapt existing software for new electronics

• Actions:• Decide on best suited detector and produce suitable detector for SPS• Plan for installation (LSS3/LSS5) during EYETS (for 2017 run)• LSS5 (new layout after LS2)

• Being discussed (NA-IONS interlock)

27/08/2015

Proposal to move BCTs in LSS5 on the other side of QD19, symmetric to old location.They will replace the BCT3 eventually.Add: beam tracking connection to beam dumpAdd: BA5 interlock entry for BCT dynamic economy


BSRT, matching and BLDMBSRT• Request: acquire beam size at SPS top energy as Beam Quality Monitor before extraction to LHC (SLI goal)

• Status: optical line upgraded during LS1• Some performance tests done (G. Trad) – calibration stability to be assessed

• Issues• Only enough light at flat-top (>400 GeV)• Radiation levels prevent use of sensitive digital cameras• Limited number of images acquired

• Longer term (2016)• Redesign electronics and software with new electronics for profiles and motors• Parallel system based on slit and intensified PM being investigated (BI/PM)• Operational integration

Matching:

• Request• Acquire turn-by-turn beam size for SPS injection matching

• Issues• Bad signal/noise with low intensity beams

• Longer-term• Low priority for LIU – standby

BLDM (satellite monitoring) – ‘nice to have’:

• Possible solution:• Use of PM on synchrotron light (high energy)

• Request:• Intensity distribution around the ring

• ~ nsec resolution (200MHz bunches)• ~1E-4 from ultimate LIU bunches (~5E7 charges)

27/08/2015

Looking for location with less dispersion,If impossible need to invest at bunch-by-bunch feasibility


Diamond BLMs• Requests:

• Acquire fast (> 400MHz) losses at SPS extraction (pre-pulses)• New requests:

• Diamond SPS injection• Diamond at SPS scraper – LIU or ?

• Solution (2014/2015):• Install commercial LeCroy scopes for diamonds in LSS4/LSS6• Software interface (FESA) implemented

• Longer-term:• Investigate the use of VFC/DI as for Fast BCT for sampling and BxB histograms (2016)

• Actions:• Clarify specifications for operational use (detector location and acquisition data)• Prototype installation for SPS (2016)

27/08/2015


Gated tune measurement• Request:

• Bunch by bunch tune measurements or on selected bunches/batches rather than default envelope

• Solution:• Install dedicated LHC-type electronics in BA2 - done• Implement software interface for BQSB – pending• LHC BPMs LSS5 could be used (request: 2500 turns for 288 bunches) but with less

sensitivity (kicks required)

• Actions:• Make necessary changes to BI front-end software (BQSB)• OP-SPS operational application modification allowing gate selection: being done. It

also needed exposure of certain settings on the FESA class• Hope to test before end 2015

27/08/2015


Upgrade of BLM system • Request

• Turn by turn acquisition of losses in SPS ring• Equip TT10 with BLMs + consolidate SPS->LHC (not LIU) • ‘Sun-glasses’ on scraper BLM (LSS1)

• Solution:• Base electronics on HL-LHC developments• Signal transmission over fibres to surface (as MOPOS)• Subset of (critical/interesting) monitors to be equipped?

• Issues:• No man-power to renovate complete system until after LS2 (priority on

PSB, PS, LHC)

• Actions:• OP/LIU to provide list of critical/interesting BLM locations• BI to investigate whether possible to equip subset during LS2

27/08/2015


Conclusions• Beam Size (BGI/BSRT/Matching/BLDM):

• Complex instruments expert presence (maintenance)• New electronics for SPS BSRT (2016)

• Wire-scanners:• New prototype to be tested with beam before end of 2015• Review of locations (2016)

• Orbit system:• Radiation testing tunnel electronics critical• Full system available by LS2

• Fast BCTs• Choice of detector (ICT/BCTW) to be made before end of 2015 (LHC/SPS)• Digital integration electronics being tested

• Diamond BLMs• Possible new locations (injection/scraper)• Operational specifications and tools

• Ionisation BLMs• No electronics upgrade before after LS2 (HL-LHC)• Subset equipped before?

• General comment (across all LIU projects):• EDMS specifications largely missing• Use of ‘LIU-JIRA’ for action follow-up

27/08/2015


Proposed list of actions:• LIU/OP/ABP:

• Head-tail: decide on OP application

• BGI: decide detector/magnet for LSS5/LS2 (2016)

• BWS: decide locations for SPS scanners (2016)

• Diamond: decide OP use-case and locations (2015)

• BLM: decide critical locations as candidates (2016)

• Tune: implement necessary changes to OP application (2016)

• BI:• BGI:

• Provide specifications for software (2016)• MOPOS:

• Produce and install electronics/software (2015->LS2)

• Determine radiation hardness of tunnel electronics (2017)

• BWS:• Provide software specifications for

prototype system (2015)• BSRT

• Provide software specifications for new system (2016)

• Fast BCT• Decide most suited detector and produce

(2016)• Gated tune

• Implement necessary changes to tune software (2015)

• BLM:• Decide on renovation/upgrade (2016-

>2018)

27/08/2015

based on lars’ progress report of liu sps bi status of follow-up 13/10/2015lars k. jensen, v....

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