status of mice

1CMPB Alain Blondel 14 April 2008

STATUS OF MICE


Aspirational MICE Schedule as of April 2008

Febuary-July 2008

STEP I

September 2008

November 2008 to summer 2009

STEP II

STEP IV Delivery of 1st FCoctober 2009!

STEP Vspring 2010

STEP VIQ4 2010 -2011

STEP III/III.1

UK PHASE I

UK PHASE II


No accessNo access

targetQ1 Q2 Q3 B1Vacuum pipeFinal targetTest target

controled controled PSI sol, BLM B2 Q4 Q5 Q6Coll, CV, CHCKOV scint TOF0

Stop/collQ7 Q8 Q9TOF1

MICE towards STEP I

Operational Installed, to be commissioned Under fabrication Missing


Overview as of April 2008

First steps of Step I: Most efforts in beam line and infrastructure. Beam and basic infrastructure reaching completion-- Beam line magnets installed, getting powered-- Control system and DAQ operating -- Target operation has been successfully demonstrated -- First beam particles through (partial) beam line -- Radiation surveys -- Measurement of particle rates (Scintillators, Cherenkov) protons and pions.-- About 1010protons hit the target at each dip for BLM 8.1 at 50mV This is two orders of magnitude below the targeting assumptions for reaching 600 good muons per target dip.

Remain to complete: -- cool down and operation of decay solenoid (to start on April 21)-- rebuild of targets to ensure more reliable operation (need two targets) -- completion of hall floor and magnetic shieldingCompletion of TOF0, TOF1 and delivery at RAL with KL end of April. ==> run full step I in June-July 2008

Mice Operation Managers (MOM) system in place, shifters system from June 2008 MICE IS A RUNNING EXPERIMENT

Remaining risk on these two items


Beam current

Target dip

Beam loss monitor

Most of shift performed with ISIS and target both at 50/128 HzAble to operate ISIS at 50 Hz at end of shift, and target at 50/64 Hz with beam loss visible but OKwithout scraping next spill

15 March 2008

Parasitic target operation demonstrated


29 March 2008

first particles through DSA

GVA2 counts

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D2 current (A) with D1=400A

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Beam line with D1 D2 powered onlyTarget activated at 50 mV beam lossD1 set to 480 MeV/cScan D2 and measure rate in GVA2 counter.30 particles per spill (will improve with other magnets especially solenoid!) in 4 ms gate.

D1

D2CKOVA&B


April 2 2008 FIRST PIONS SEEN IN MICE!

The two Cherenkovs (Mississipi) situated at the end of controlled area were powered on April 2. Threshold 240 and 280 for pions respectively. 480 is well above.

A few pions were seen!

GVA2 scint

CKOV2 PM1

CKOV2 PM2

CKOV2 PM3


April 4 2008 MICE DAQ running

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First data analysis with DAQ recorded data:GVA2-GVA1 time-of-flight allows observationof pion peak…

D2 Current (Amps) V GVA2/GVA1

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D2 Current

Counts in GVA2


Proton ratesThe 7-30 protons/dip observed correspond to 0.5-2 1010 protons intersecting the targetThe MICE assumed muon rate is 600 per target dip (one per second)This corresponds to 1.7 1012 protons intersecting the target during the 1ms

The old HEP target was dipping 1-2ms (at 7ms in the spill i.e. ~600MeV protons)At 50Hz and the Beam Loss Monitor max. was 0.2 Volts(sources, Dean Adams, Rob Edgecock)

Our target is dipping for an effective duration of about 2 ms so we should be able to recover a factor 100 without activating ISIS more than the old target. How do we go about this?


Spectrometer solenoids

I II

Delay due to cold mass support issue will arrive at RAL Aug 08/ Oct 08


TRACKERSci-fi tracker with 5 stations of 3 views of 350 microns diam. fibers

Tracker construction complete

Superb quality of construction (1/5000 channels dead)

Test on cosmics at RAL

Install August 2008 for step II


Spool piece and step III.1 absorbers

Spool piece principle above (Nichols, Perrin)Access slit 4 by 52 cm. Allows plastic, Al, Cu, or LiH absorber.

Marco Apollonio


Sandwich calorimeter

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Collaboration: FNAL, scintillator, fibers Trieste mechanical assembly, PMTsUNIGE PMTs electronics

Funding bid prepared at UNIGE, according to “Sandstroem design”Need a more detailed note of the project !!! Many questions open: support, noise, readout scheme etc…

Expect this device in MICE in first half of 2009

CMPB Alain Blondel 14 April 2008 14

RF R&D – 201 MHz Cavity Design

The 201 MHz Cavity – 19 MV/m Gradient Achieved (Design – 16MV/m)In low (few hundred G) B field. Still no breakdown. Limited by available

power

CMPB Alain Blondel 14 April 2008 15

MICE RF Cavity in Magnetic Field

201 MHz cavity now moved as close as possible to 5T solenoid

Can obtain 1.5T on window

Coupling coil expected end 2008 for >2T measurements


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Conclusions - Status

Step I of MICE has started!

-So far we have been running the MICE target in mode consistent with parasitic running.

-Both dipoles have been powered and particles observed, incl. some pions.

- Rate of protons intersecting the target estimated. Value consistent with expected, but >= two orders of magnitude missing for MICE final operation.

-Need to successfully operate the second target, install TOF0 and TOF1 and KL and to complete the false floor and iron shield in order to complete stage 1 ==> June-July 2008.

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Conclusions-II

-Step II should occur in the September-October run after the spectrometer magnet arrives (August).

-Steps III, III.1 should occur late 2008 or early 2009.

-Coupling coils (Harbin China, LBNL) and RF cavities (LBNL) construction schedule: first Coupling coil in spting 2009, first RFCC module Q4 2009 (step V) and second one a few months later (STEPVI)

-Focus pair order has been agreed,first magnet delivery expected in October 2009 (step IV) second spring 2010 (step V). Third module still in the air. SCHEDULE-DEFINING ITEM.

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Aspirational MICE Schedule as of April 2008

Febuary-July 2008

STEP I

September 2008

November 2008 to summer 2009

STEP II

STEP IV Delivery of 1st FCoctober 2009!

STEP Vspring 2010

STEP VIQ4 2010 -2011

STEP III/III.1

UK PHASE I

UK PHASE II

status of mice

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