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K. Tilley, MICE-VC, 10/05/07

Status of Beamline Design / Commissioning MICE-VC. K. Tilley, MICE-VC, 10/05/07. Plan. Status of Beamline Design. Design. Some additional comments received re: Response to BL review. Aim to include & get response to PD/Tech Board next week. To reviewers 25 th ? .

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K. Tilley, MICE-VC, 10/05/07

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  1. Status of Beamline Design / CommissioningMICE-VC K. Tilley, MICE-VC, 10/05/07

  2. Plan Status of Beamline Design

  3. Design • Some additional comments received re: Response to BL review. Aim to include & get response to PD/Tech Board next week. To reviewers 25th?

  4. Efforts to establish a trustworthy model of the Beamline (i) Design Pre-CM17 case … Downstream lattice:: List of possible causes Current

  5. Efforts to establish a trustworthy model of the Beamline (ii) Design Strategy: - to aid cleaner interpretation Needs focussed code/processing time. Have ~2.5weeks to milestone. Mainly KW/fraction of KT. Do need others actively involved.

  6. Optimisation Design • Albeit code comparison ongoing – - techniques being exercised to produce (6,200) in G4BL - being undertaken by Dazhang Huang (IIT) & Tom (MuonsInc)

  7. Pre-commissioning: Magnet tests Commissioning - Extensive discussion on dipole/quad magnet tests/method important measurements: polarities of magnets current to field relationship magnetic alignment: need simple tools to check field centres; Standardisation procedure? ideal measurements: field quality/uniformity effective length - Outline above needs-> new doc? (KT) - Need to identify individual now. to help drive this through (jig design/kit &/or measurements) requires 3xjigs & kit for July measurements. - Need to confirm workshop now to produce eqpt. FOR July. (possibly ISIS w/shop / but…?) - Decay solenoid?

  8. Online prePhase1 beam commissioning planning: Commissioning - At time of writing we (BL group) have made ~ 2 separate, incomplete run plans.- + initial discussions with RIKEN people re: commissioning RIKEN/ISIS beamline • -Forward planning has been insufficient attention. • Intention to begin deeper focussed discussions this week (Friday 11th May 10:30 BST): all welcome • Hope to have at least outline, complete plans for discussion at CM18 by MICE.

  9. Basic beam monitors: Commissioning - Already established need 2x detectors- Applications: Upstream: Beam present / flux Beam size / centre (esp. vertically) BBA still being discussed Downstream: Beam present / flux Beam size / centre (mainly for gross errors) BBA still being discussed - Specifications: Upstream: Size ~20x20cm suitable : Resolution ~ 6mm ok for flux/ctr/size (1mm if BBA). Build with 1mm’s : Rates: order of magnitude estimate for nominal case ~10^9Hz inst : Fields: given Downstream: Size ~ 44.8x44.8cm suitable : Resolution ~1.4cm ok for flux/ctr/size (1mm if BBA). Build with 1mm’s : Rates: order of magnitude estimate for nominal case. ~10^8Hz inst : Fields: given Final readout solutions for both monitors in development.

  10. Plan + progress along these items… Status of Beamline Design

  11. Basic Beamline monitors Supplementary re: detectors Specification / applications Upstream: Main home Measure at Nominal pos: Beam PresentBeam FluxAverage y centre/sizeSpeculative within Quads (fault finding) Beam Present/flux u/str No concensus yet on BBA. Difficult here. (-> a later detector if rqd?) Poss v. temp locations (fault finding/startup?) Size: 20x20cm good(beamsize Y<=12cm @ nom posn)Fields:max 130Gauss verticallyRate estimate (TJRcm7): (mostly protons). Nominal target dip, assumptions etc -> ~ 1x10^6/ms (believed spread evenly over whole 15.2x112cm area) Upstream

  12. Basic Beamline monitors Supplementary re: detectors Specification / applications Downstream Main home Commissioning / fault finding locations Measurements:Beam PresentBeam FluxGross errors in position etc No concensus yet on BBA. (-> a later detector if rqd?) Size: 44.8x44.8cm good(mostly covers Q35 aps)Fields:max 190Gauss vertically(if Decay Sol<->B2)Rate estimates: - see next slides`

  13. Basic Beamline monitors Rates: Estimated based on G4BL TOF0 CM14-6-200 Rate (3.22MHz): - which usesnormal target insertion, production & normalisation assumptions………..Then using Turtle pion+muon local fluxes & scaling 3.22MHz appropriately.Note the figure is for beam over all area. If a second (lower) figure given – this is implies the rate for the smaller 44.8x44.8cm is as given & is lower. Supplementary re: detectors: d/str rate ests Specification / applications Downstream Main home Commissioning / fault finding locations Before C2H4 (protons included): pi+mu ~ 1212MHz After C2H4 (protons removed): pi+mu ~ 121MHz b4t0: pi+mu ~ 3.22MHz b4Q5 : pi+mu ~ 5.6MHz b4q8: pi+mu ~ 2.0MHz @MICE: pi+mu ~ 1.69 MHz b4Q4 : pi+mu ~ 116MHz(~115MHz 44.8x44.8cm) b4q9: pi+mu ~ 1.78MHz b4q7: pi+mu ~ 3.18MHz(~3.16MHz 44.8x44.8cm) b4Q6: pi+mu ~ 3.8MHz

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