The set of PRY-support legs delivered to RAL last week have been installed. They have been aligned and the bespoke shims that will be slotted under their feet are now being machined. At Keller in New York the trial “fit-up” up of the PRY plates with the second set of legs has been completed successfully. Excellent progress all around!
Next week, the shims will be fitted and the alignment of the legs in the Hall will be checked. Once these operations are complete, the legs will be removed so that the magnets can be moved out of the beam position allowing access to the south side of the experiment. The legs will then be installed in their final resting place, on the south side of the experiment.
The steady progress on completing the wiring in Rack Room 2 continues.
Arrangements for the first operation of MICE with beam on 08Mar15 are firming up. The focus of this run will be to debug and commission the MICE Muon Beam and the upstream instrumentation (as far as TOF1). The objective will be to leave the experiment in such a state that TOF calibration can start in the first set of weekend runs (21/22 Mar15).
The near future:¶
MICE Hall: ¶
The installation of the components of the PRY remains the priority for work in the Hall. The excellent progress at Keller highlights the need for the MICE Hall team to be well prepared for the two-shift installation operation that will start on the 16Mar15.
A focused operations meeting will take place on Monday 02Mar15 to discuss arrangements for the 08Mar15 run. As part of the preparation, a second mock-data run is now scheduled for the 05Mar15. Details of the planning will be circulated by Pierrick Hanlet (outgoing MOM) or Yordan Karadzhov (incoming MOM) next week. Steve Boyd will present the status of the Operations activities at next week’s Video Conference.
Weekend operations from 21Mar15:¶
This point is included to remind you to sign up for shifts. These shifts are important to the experiment to get a head start on commissioning and are an excellent opportunity to learn to operate the apparatus.
The decay solenoid will not be available during the Easter weekend. By that time, it is expected that we will be ready to tune the muon beam. Therefore shifts will not be scheduled over the Easter weekend but will resume on the weekend of the 11Apr15 when it is anticipated that the decay solenoid will be ready for operation once more.
The first shipment of legs for the partial return yoke arrived on Tuesday (17Feb15). The legs were received in R9 and prepared for installation; nuts to hold the jacking bolts were welded into the feet of the first set of legs which were then moved to the Hall on Friday and fitted in position. Welding of the nuts on the second set of legs took place today so that they can be fitted into position in the Hall tomorrow. Once the legs are position coarse alignment will be performed before the geometer is called in to make the final alignment.
The steady progress on completing the wiring in Rack Room 2 continues.
On the operations side, many of the issues noted in the first mock data run have been addressed. Regular operations meetings have begun; Steve Boyd is setting up a mailing list, the sister of the MICE Hall list, to disseminate the information from these meetings.
The near future:¶
MICE Hall: Priority for work in the Hall remains the completion of the installation and alignment of the PRY legs on the North Side of the channel. The Hall team is gradually being augmented; this week Kevin Ladhams from Imperial will join the team. Once the preparation for the alignment of the PRY legs is complete, work will restart on the installation of support of cryogenic services and electrical services while the alignment itself is carried out.
08Mar15: The operations team are preparing for running on the 08Mar15. The schedule for this run remains as in the previous status report. Detailed plans will be circulated by Steve Boyd and Pierrick Hanlet (MOM) in the near future.
Weekend operations from 21Mar15: Weekend operations will start on the weekend of the 21Mar15. The shift sign-up for the 08Mar15 run and the weekend runs is live in CHEESE; you are urged to volunteer as soon as possible.
Following the discussions at CM41 another pass is being made through the commissioning and running plans for Step IV that we laid last autumn. The assumptions made (trigger rates etc) will be revisited and the time estimates checked. Progress on the review of the commissioning and operations plans will be presented at the next VC. With this re-analysis we will be able to revisit the Step IV shift allocation. As part of this re-analysis a weekly planned maintenance day is being considered.
Weekend operations starting 21Mar15:¶
○ During the ISIS User Run we can schedule operations. The two-shift working arrangements outlined above are scheduled to take place from 06:00 on a Monday to 14:00 on a Friday. This leaves the weekends free for operation.
○ The timetable for weekend running in the coming User Run will be:
• Friday, 15:00: Hall available to operations team;
□ Friday afternoon will be reserved for shift training and for searching and securing the Hall ready for operations to start 08:00 on Saturday.
• Saturday and Sunday: 08:00 — 24:00:
□ Two shifts (08:00-16:00 and 16:00-24:00);
□ The last two hours on Sunday night will be reserved for making the Hall ready for the construction work to start at 06:00 on Monday morning.
○ This running schedule makes it necessary to start a regular series of operations meetings. These will be:
• Fridays, 11:00:
□ This will be an in-person meeting of those directly involved in the weekend’s running. Shift personnel, MOM, system experts on call for the weekend, Operations Coordinator, Spoke/Deputy are required to attend.
□ The meeting will be “like the Hall Meeting”, i.e. you have to be there, there will not be a phone connection. The focus will be the operational activities to be carried out that weekend.
• Mondays, 15:00:
□ This will be an in-person meeting for those directly involved in the weekend’s running, with phone connection to allow remote participation.
□ The focus of the Monday meeting will be to review progress and problems, to identify items that require work and to begin the planning of the following weekend.
With the construction, operations and analysis leads, I discussed what a block diagram for User Runs 2014(03) and 2015(01) might look like. The result, which we need to discuss and refine at the collaboration meeting, is: • User Run 2014(03); “now” to 01May15: ○ MICE Muon Beam commissioning; ○ TOF2, KL, EMR commissioning with beam; ○ Alignment and calibration; • User Run 2015(01a): 02Jun15 to 05Jul15; ○ Tracker commissioning with beam in parallel to magnet training; Obviously more detail is required; Chris Rogers has agreed to organise a meeting in March at which the various inputs to the detailed run plan will be discussed. Looking forward to our discussions at the collaboration meeting next week;
Steady progress has been made towards the completion of Step IV. Examples of the tasks completed this week include: load tests on the PRY tie-downs; installation of the new optical fibres for the target and the junction boxes inside and outside the sync; and the fitting of cable-tray covers to the South Mezzanine. Work in Rack Room 2 progresses steadily too with the dump-circuits wired in and many of the large cables terminated.
The PPS annual functional test was carried out on Wednesday. This was a long day for those involved (Craig Macwaters, Henry Nebrensky and Phil Warburton). The test went well and the system was passed as functionally correct. A number of issues have been identified which will need to be addressed in the coming weeks.
Work to define, and then address, the issues noted in the 21Jan15 mock data-run is in hand. Chris Rogers completed the MICE Note summarising the run and documenting the issues to be addressed (MICE Note 456). Pierrick Hanlet as MOM is now helping to organise the work required to address the issues; particularly those for which coordination with the construction team or between detector groups is required. Its encouraging to note that a number of issues have already been resolved and that the number of issues that require cross-team coordination is low.
The near future:¶
The first set of PRY legs are now expected to arrive at RAL next week. The receipt and installation of the legs on the north side will then begin. Once the north-side installation has been completed, the legs will be removed so that the magnets can be moved to the parked position to allow the legs to be mounted in their final Step IV positions on the south side.
The PRY plates are scheduled to arrive at RAL with the second set of legs on 16Mar15. To expedite the installation of the PRY, the project team have decided to begin two-shift working from 16Mar15. The necessary technical and engineering effort has been secured. Roy Preece, Andy Nichols, Jason Tarrant and John Govans are now making the detailed plans necessary to make this, the final push in the installation of Step IV, a success.
The knock on effect to the run proposed for the 08Mar15 is that it has been necessary to scale back the ambitions. The plans for operations until the end of User Run 2015(01) are now:
○ MICE has been allocated two shifts (08:30-16:30 and 16:30-24:00) during which we may take beam into the Hall. ○ In view of the construction schedule and pressure on individuals it has been agreed to take data using the beam-line instrumentation as far as TOF I. • The positions of the instrumentation, the magnets and other equipment downstream of TOF I will be as required for the installation of the PRY. TOF1, and the equipment upstream of TOF1 is unaffected by the PRY activities. ○ The revised goals for operation on the 08Mar15 are to: • Time-in and commission the MICE target in the 700 MeV ISIS beam; • Time-in and commission the MICE DAQ, controls etc. and detectors up to TOF1; • Leave the experiment in such a state that alignment/calibration of the detectors up to TOF1 could begin. ○ Planning for the day so far is: • Lock and search Hall at the end of the construction work on Friday 06Mar15; • 08:00 on 08Mar16: □ Prepare for operation; • 10:00—22:00 on 08Mar16: □ Operation of the experiment; the run plan will be prepared by the MOM; • 22:00 (latest) on 08Mar16: □ Operations cease to allow … • 22:00-23:59 on 08Mar16: □ Close down Hall ready so that it is ready for the construction team to start on Monday 09Mar15.
On Thursday and Friday we fully trained 12 new shifters and 3 additional partially trained shifters.
Many contributed to the training; I would like to thank:
- Chris Rogers for initial preparations
- Rose Hayes for arranging RAL inductions
- Henry Nebrensky for general invaluable help and assistance in organization
- Chris Heidt, Adam Dobbs, Rhys Gardener, Ed Overton, Henry Nebrensky, John Govans for shifter training
Several things were learned from shifter training by the experts and these will need to be resolved before the next
training session; the MOM and Steve will address them.
Bravo to all involved and on to Step IV data taking!
During week 24-29/11 the INFN team did the local shielding of TOF1, rebuilding completely the detector in situ with a new support system.
Local shielding is done with ARMCO plates in a way similar to TOF2.
During operation only a PMT was found broken and replaced (channel # 60).
In the new configuration downstream scintillator bars are horizontal.
The upgrade was completed succesfully without major problems. A MICE note describing the intervention will soon be provided.
Although the summary says that the report on CM40 is by Ken Long it is not obvious on the news item.
CM40 in Rome was a resounding success. Progress on all aspects of the project was excellent; I’ll pick out only a few of the highlights:
• The two remaining Step I papers, the performance of the EMR in the MICE Muon Beam and the determination of the pion contamination in the beam, are both proceeding well. Wise persons for both papers have been appointed. Victoria will coordinate the efforts of the authors with the oversight and advice of the wise persons to bring the papers to the collaboration in as short a time as possible;
• All the equipment required for Step IV is now available. FC2 has essentially met its acceptance criteria, making it no longer necessary to consider operations at Step IV with de-rated focus coil currents. The remaining issue for Step IV is the completion of the partial return yoke. While the material has been delayed by a typhoon in the Pacific, Alan Bross, Roy and the project team are making arrangements to expedite its manufacture and installation;
• The “Data Block Challenge” has delivered the first end-to-end simulation, followed by the reconstruction, of the experiment. This is a substantial achievement and Ryan and the team deserve congratulations. Gremlins and other issues have been identified and while the data sets produced in the first Data Challenge are unlikely to be long lived, the analysers can now interact with the software developers to make the discipline of working on “official” simulation and reconstruction data sets a more easy and straight-forward affair; and
• The planning of Step IV operations is becoming more robust with carefully prepared commissioning and running plans being discussed. Careful planning is essential if we are to deliver the Step IV physics programme despite the pressures on the Step IV running period coming from the integration of the equipment needed to carry out the cooling demonstration.
Discussion of the revised configuration by which the collaboration can demonstrate, and study, ionization cooling was a feature of the meeting. The contributions to the dedicated plenary session devoted to the topic were excellent and represented the summary of outstanding contributions by all of those involved. To choose between the reference and alternative lattice the following, priority ordered, criteria have been defined:
1. 4D emittance reduction; transmission/scraping:
• Since the simulations to date have not included a full simulation or reconstruction of the experiment it is essential that the configuration we adopt produces a 4D cooling effect that is measurable and can be studied systematically.
2. 6D emittance reduction:
• The largest change in 6D emittance presented at the CM, with an appropriate/careful phase-space selection, was at the 1% level and the excursions in the 6D emittance as the beam propagated through the experiment were significantly greater that 1%. A large amount of data may have to be integrated to measure such a small effect. Therefore 6D emittance reduction is a desirable, rather than an essential, criterion.
3. Lattice cell:
• MICE was approved to demonstrate a “realistic” section of cooling channel. Ideally the cell, or section, that we construct should be capable of being incorporated in an extended cooling channel. This implies appropriate matching criteria. In developing the lattice the criterion that the cell be capable of being incorporated in a section of a lattice cell is a desirable characteristic.
The papers for the review of the experiment which will take place on the 24th and 25th November at RAL have been prepared (http://micewww.pp.rl.ac.uk/projects/governance/wiki/2014-11-24-Review). The reference lattice (shown in the figure below) has been shown to have superior 4D performance and better transmission. Each of these properties can be traced to the evolution of the beta function as a function of position along the channel. The performance of the reference and alternative in 6D is being checked. So, subject to the checks on the 6D phase-space evolution that are presently being performed, the reference lattice will be adopted.
At this week’s video conference the contents of the papers submitted to the November review of the experiment will be summarised. In addition, the status of the analysis of the reference and alternative lattices will be presented.
A note from Chris Rogers¶
I proposed holding a "kick-off" meeting for the "Description of MICE Step IV" paper. I propose holding this at RAL the day after the MPB in order to help international colleagues to attend. This is Wednesday 26th November. Could you please let me know if this is a problem. Proposed agenda is here:
A phone connection will be available. I will need to find a room reasonably soon, so do let me know if this date/location does not work out for you.
Accelerator Open Day¶
The laboratory is holding an accelerator open day for students on November 26th. MICE has been asked to be involved. There will be a poster session and tours. Half the students will look at posters, while the other half make a number of visits, including one to the MICE hall. Then halves will then reverse. Thus we need to provide at least one person to man the poster, while a second person leads the tour of the hall. We also need some suitable posters. I am looking for volenteers as guides and for the posters. I am also looking for suitable posters, either existing or for someone to prepare one or more specially for the day. Please respond to Paul.Kyberd@brunel.ac.uk.
Focus Coil 1 arriving in the Hall. Friday 20th June
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