1MICE CM15 wrap-up Alain Blondel 11 June 2006
MICE CM 15wrap-up
Collaboration meeting 8-11 June 2006 at Fermilabcomplete review of the project.
thanks to Alan Bross, Malcolm Ellis, Jean-Sebastien Graulich and Jim Norem for organisation of the meeting and agenda and Dinner!
Wrap up was much helped by ‘what can go wrong’ session… self evaluation is very efficient! should follow-up!
Please comment and complete as I go along!
2MICE CM15 wrap-up Alain Blondel 11 June 2006
STEP I: 15 September 2007 = 460 days away!
STEP II: soon after
PHASE I
MAIN GOAL of meeting: Understand where we stand in our preparations for Steps I and II. -- beam line: target, optics, tuning and correction abilities, diffuser -- TOF, Cherenkov1, EMCAL (size of shield&TOF2&EMCAL must be decided)-- tracker-- spectrometer solenoid -- installation and cabling-- controls and monitoring-- trigger, DAQ and event processing-- software: upstream and downstream particle ID, reconstruction of tracks-- analysis: form run plan, reconstruction of « beam», emittance, transmission
3MICE CM15 wrap-up Alain Blondel 11 June 2006
Target
Clearly the highest risk issue in MICE review tomorrow
Much progress and growing team! The depth of dip will be carefully written on data stream… Precious for understanding of rates, etc..
Issues raised: -- heating problem when exciting to 40A (instead of presently 5 A)
==> personnally believe that redesign may be necessary to include more-than-adequate cooling system -- avoid that failure leads to target stuck in beam! + should have a fool-proof indicator that target is in beam position.
Not obvious that test in October will be able to be performed with final system. How far from it will it be? Will it address enough critical issues?
4MICE CM15 wrap-up Alain Blondel 11 June 2006
Beam Line and Optics
Want to see the full performance matrix:
Still needed before in-hall final design and construction begins
and a few more features: correctors, (can we adjust five parameters with four magnets?) collimators, are they needed for the small emittance beam?diagnostics (any?)
review tomorrowmuch progress in engineering
5MICE CM15 wrap-up Alain Blondel 11 June 2006
CKOV1Louvain-Mississipi collaboration
Design will allow improved separation between muons and pions in the high momentum range.
two units needed. (200-260 and 260-365)
yes/no but also pulse height?
beam test at fermilab this summer, will be ready for MICE start-up.
6MICE CM15 wrap-up Alain Blondel 11 June 2006
TOF
Ennoying questions: TOF2 said to be mid-2008. Can this be brought forward? what will happen with x-ray radiation when we run with RF?
Issue: particles crossing material in the downstream end of the spectrometerthis is a beam of 100-300 MeV/c, all generated with 4T field in spectrometer. How about the size of the hole in the shielding
Preparations of TOF0 test on-going (Milano-Pavia)double layer allows measurement of resolution, meast is of this is the main aim of the test
7MICE CM15 wrap-up Alain Blondel 11 June 2006
EMCAL
fully Active Scintillator
upgraded simulations show much better performance eff 99.90% -> rejecting 97.7%wrt Osaka: to be verified for the whole matrix and for the non-flip mode.SIZE is the matter now!
New design Intense preparation in Roma3for the testbeam in July
8MICE CM15 wrap-up Alain Blondel 11 June 2006
Tracker
excellent review passed in April !
KEK beam results: alignment to a few tens of micronsvery precise metrology! (see how pitch was measured! -->)still some to be understood (chi2?)
residuals in # channels
channel number
Production of final tracker
1.QA will be very careful to avoid misalignment (loss of light)and channel garbling that occured previously:
planning: QA verified on earlier stations
5th station starting mid-augustevaluation by mid september then start production
9MICE CM15 wrap-up Alain Blondel 11 June 2006
Spectrometer Solenoid
conductor purchased and accepted. Final vendor selection nearly complete
Procurement contract expected to be placed before the end of June
--> delivery expected end-summer 2007. (how about second solenoid?)
10MICE CM15 wrap-up Alain Blondel 11 June 2006
DAQ and monitoring
two connected issues
Controls and Monitoring: Basic system with EPICS. The use of Hytec 9010 IOC and IP modules is recommended for most applications. Two such IOC systems already procuredfor target (sheffield) and for H2 system (at RAL) More complex systems may require VME interface
DAQWill acquire the particle-generated signals and data. global « spill trigger »+ still needs a particle-based trigger (supp. TOF0+TOF1) Based on ALICE software DATE will record at every spill the system data required for analysis(list should be established of a minimum sufficient set of such data)
Final electronics choices and DAQ modules will be proposed at RAL meeting in october
11MICE CM15 wrap-up Alain Blondel 11 June 2006
AFC module
CryocoolersGM or PT???? that is the question. We will for sure have a mixed system since tracker cryo uses GM and spectrometer solenoid uses PT. Any advantage in unification? Sensitivity to magnetic field to be tested/understood for both. Beautiful field calculations by H. Whitt
AbsorbersSituation was very advanced in 2004 -- much slowed down by interruption of ICAR fundinga number of issues remain (i.e. QA of production windows, for instance) … and production of course. A problem to be solved
LH2 Safety & HAZOPresponse to safety document will be finished well before next CMPB!HAZOP document (impressive) almost final 22 recommandations! which to implement? working group-->collab --> TB review.
what will be the users interface? (only instructions on how to respond to alarms and phone experts?)
12MICE CM15 wrap-up Alain Blondel 11 June 2006
G-10 SupportAbsorber & Pipes
Mini In-Flange
30 PinFeedthrough
Tee
L-H2 IN
G-H2 OUT
He/N2 OUT
He/N2 IN
Ishimoto
slight changes and improvements to the design. <--
Instrumentation, feedthroughs.. being worked out. Indication of cooling time to be 57 h -- better solution for convection to be found
New development of two phase hyperfluid He cooling, big jump in conductivity (>10 orders of magnitude)
13MICE CM15 wrap-up Alain Blondel 11 June 2006
RF cavities
200 MHz cavity powered and first measurements made, including effect of stray magnetic field (multipactor!)
measurements of background rates are about to begin B=0 or stray field (up to 1.25 T).
will constitute precious normalization for simulations(the level of V at which we run will be determined by RF power limit or Bkg hit limitwhichever is smallest)
5 ports have been foeressn to identify electron sources
14MICE CM15 wrap-up Alain Blondel 11 June 2006
RF power
LBNL:Two “4MW” + three “300kW” systems shipped
to DLStrip down and rebuild as a test stand
CERN:Two “3MW” systems available at CERNRequest to CERN to refurbish
DL/RAL:New B4616 tubes (1 working LBNL tube)New TH116 tube bases (purchase in time)New kW power supplies (Dressler)
MICE should have 8MW @ 201 MHz available by 2008given possibility to run with L.N2 re-acceleration by ~34 MV should be availablefrom two RFCC modules
aim at having it all working by end of 2007
15MICE CM15 wrap-up Alain Blondel 11 June 2006
Physics and analysisaligment of magnetic axis of exeriment
electric field (Li): measurement of pulse amplitude vs time + phase for each cavitymaster clock?
LH2 thickness (measurement of absorber warm shape vs pressure) LH2 density from pressure and temperature measurements OK OK (<310-3) for L. H2 and most solids. Marginal or difficult for LiH and He
channel transmission measurement (Marco Apollonio)--> trigger must be based on TOF0 + TOFI (not TOFII) so that T= muons in tracker 2/ muons in tracker 1 can be measured.
PID performance (Sandström)much improvement must be turned into a user friendly package before RS flies away! tuning on data?
Measurement of longitudinal emittance (Rogers)issues with minimizing the effect of propagation of tracker precisionmeasurement of tracker resolution will be very important (step III)Very important to keep all acceptance.
still needed; run plan + note on TOF2 need
Software is in great progress… Interface with engineering reference system to be envisaged (so that we simulate what is built)(or at least that we think that we simulate what we think is built)
16MICE CM15 wrap-up Alain Blondel 11 June 2006
17MICE CM15 wrap-up Alain Blondel 11 June 2006
18MICE CM15 wrap-up Alain Blondel 11 June 2006
PHASE II discussion
main issue: accelerator physics case for MICE PHASEII.
Q: why do we test study II cooling cell rather than the (simpler one) of Study Iia, or the ISS recommended one or the more powerful one of Muons Inc..?
A1: The MICE hardware is very mature and ready to construct and test -- in fact it is the only one in that state, other possibilities (such as study IIa,b, or ISS recommended) are not studied and designed quite yet.
A2: Equipment that MICE builds is not only useful to test Study II cooling channel, it (in particular AFC module) has flexibility for many other optics or absorber materials, and MICE is precise enough to evaluate small expected (and unexpected) differences between them.
A3: The RF modules are absolutely essential in demonstrating the fact that beam can be reaccelerated, in all cooling systems envisaged.
19MICE CM15 wrap-up Alain Blondel 11 June 2006
or: of MICE and MANXMANX LOI was submitted in may 2006 to Fermilab
MANX is a cooling system based on a helicoidal focusing channel a very challenging magnet (3-5m long SC) around L.He. absorbers. Claim of 500% cooling (vs 10% for MICE) incl. long. emittance reduction.
It is suggested that MANX can eventually be tested in the RAL muon beam, using the spectrometers and diagnostics of MICE Caveats:-- the matching of all this has not been completely demonstrated-- the gauge ‘how much beam is cooled’ may not be the same between MANX LOI and MICE-- re-acceleration of muons after such cooling requires matching to RF cavity modules such as those of MICE -- not demonstrated either -- MICE is an approved experiment (this was hard enough!) and will be completed as proposed
Given these caveats, we certainly support MANX and wish it success, as a possible follow-up on MICE. Looking forward to fruitful collaboration
« PHASE III: »
20MICE CM15 wrap-up Alain Blondel 11 June 2006
MANX minimal step (no RF) (T.Roberts)
21MICE CM15 wrap-up Alain Blondel 11 June 2006
To be achieved by next CM meeting at RAL:(incomplete to-do list)
target and beam linesolutions to be found for several target problems: 1. heating at high drive current ? would like to see an engineering designready for target test in October organize tour of target at CM :-)
beam line pending issuescorrectors verify all the optics we want status report VC end of July
check the diffuser (a small edge effect at 200 MeV/c) (resp of Tracker group)check also the scraping at the downstream end!-->He window and radiation shield are also responsibility of tracker! Magnetic shield 2 could be responsibility of TOF group --> Palladino
Response to H2 safety committee decisions on HAZOP interim report TB end of July. review in September
Decisions on cryocoolers to be placed on agenda of TB to be followed to Exec. Board(Decision is said to be: Pulse Tube for everything except the VLPC cryostat)
blue/red = exec-board comment or decision
22MICE CM15 wrap-up Alain Blondel 11 June 2006
Test beam in Frascati!Finalize downstream PID size and shield setup (VC in 19 july) Study issue of RF x-rays to TOF --> on Yagmur Production of first ‘final’ tracker station progress report in september
Finalize DAQ schemereport after test beam i.e. August
Understand precisely the schedule of Spectrometer solenoidsreport on 19 julywhat happens from delivery in US to operation in RAL
Submission of UK Phase II bid
First engineering study of CC by Harbin VC in July
Launch MICE data challenge! --> on Yagmur
To be achieved by next CM meeting at RAL:(incomplete to-do list)
23MICE CM15 wrap-up Alain Blondel 11 June 2006
MICE SCHEDULE
modification since OSAKA:
-- ISIS schedule shift
-- excellent news from spectrometer solenoids (being ordered!)
-- better news on coupling coils (MUCOOL coil, from DOE; MICE coils, from Harbin ICST)
24MICE CM15 wrap-up Alain Blondel 11 June 2006
MICE schedule as could be found in the proposal (january 2003)
25MICE CM15 wrap-up Alain Blondel 11 June 2006
MICE proposal: January 2003MICE approval: March 2005
26MICE CM15 wrap-up Alain Blondel 11 June 2006
- STEP I:
April 2007
STEP II: October 2007
STEP III: 2008
STEP IV: 2008
STEP V2008?
STEP VI 2009?2009?
implementation in steps
physics-based: understanding of
systematics
all configurations successfully
matched optically
PHASE I
PHASE II
MICE schedule in Frascati June 2005
27MICE CM15 wrap-up Alain Blondel 11 June 2006
Aspirational MICE Schedule now (reasonably optimistic as always)
15 September 2007 NB: picture does not include target, beam line, hall infrastructure, electronics, DAQ, shifters etc… !
STEP I
15 November 2007
STEP III: Winter 2008
STEP II
STEP IV Fall 2008
STEP V Spring 2009
STEP VI Fall 2009
28MICE CM15 wrap-up Alain Blondel 11 June 2006
A few Uncertainties (or risks) as I see them (please complete!)
1. Will target be ready and operating?
2. Will PSI solenoid resurrect?
2. Will EMCAL be ready on 15 september 2007?
3. Will TOF2 be ready end 2007?
4. Will MICE UK Phase II bid be approved?
5. Will a solution be found to finish absorber body and windows R&D and construction?
6. Will Harbin funding request come through?
etc…
How will MICE survive when Chris and Rikard have finished their thesis?
How will we man/woman the shifts?
These will be three years of intense activity: are there going to be enough of us?
29MICE CM15 wrap-up Alain Blondel 11 June 2006
CONCLUSIONS
1. This has been an extremely sucessful meeting, excellent and well prepared talks described lots of work
2. so much is happening in MICE!
3. ***460 days*** to data taking
4. We are welcoming new collaborators and having an increasing (still very cautious!) confidence in the schedule!
5. Both ‘done’ and ‘to-do’ lists are growing fast…
6. See you many at RAL, 8-12 october 2006!