# Presentation: 940539

## MICE Beamline Commissioning

- Goals
- Demonstrate operation of target in ISIS proton beam
- Investigate target dip depth vs.  ISIS beam loss monitors
- First measurement of particle rates
- Progress
- Summary

**Full version of this talk and further documentation of MICE beamline commissioning at**
**http://dpnc.unige.ch/users/blondel/MICE/status-report/2008**

## D1

**D1**

**D2**

**Q1**

**Q2**

**Target**

**Q3**

**DS**

**Q4 Q5 Q6**

**BC1**

**BM1,BC2**

**GVA1**

**GVA2**

**CKOVA**

**CKOVB**

**BM2**

**Q4 Q5 Q6**

**Target:  titanium paddle**
**           ****inserted into ISIS**
**           ****proton beam**
**Q1, Q2, Q3,**
**Q4, Q5, Q6:  quadrupoles**
**DS:  Decay Solenoid**
**D1, D2:  Dipole Magnets**
**BM1, BM2:  beam line **
**  ****monitors consisting of **
**  ****scintillating fibers**
**BC1, BC2:  16 channel **
**  ****checkerboard scintillating**
**  ****counters**
**GVA1, GVA2:  20x20 cm****2**
**  ****scintillator**
**CKOVA, CKOVB:  Cherenkov**
**  ****counters to ID pions**

## D1

**D1**

**D2**

**Q1**

**Q2**

**Target**

**Q3**

**DS**

**Q4 Q5 Q6**

**BC1**

**BM1,BC2**

**GVA1**

**GVA2**

**CKOVA**

**CKOVB**

**BM2**

**Q4 Q5 Q6**

_**Notes**_
**Simplified beamline of **
**  ****D1, D2 (no DS, Q1, Q2,**
**  ****Q3, Q4, Q5, Q6)**
**BC1, BC2 (16 channel **
**  ****checkerboard scintillator)**
**  ****not used**
**BM1, BM2 output partially**
**  ****understood**

## Beam current

**Beam current**
**Target dip**
**Beam loss monitor**

**Able to operate ISIS at 50 Hz and target at 50/64 Hz **
**Beam loss visible but OK without scraping next spill**

**15 March 2008**
**Parasitic target operation demonstrated**

**Small beam loss increase**
**with target insertion**

**No beam loss increase**
**when target not in **

## 29 March 2008 

**29 March 2008 **
**first particles through DSA**

**Beam line with only D1 D2 powered**
**Target activated at 50 mV beam loss**
**D1 set to 480 MeV/c**
**Scan D2 and measure rate in GVA2 counter.**
**35 particles per spill (will improve with other **
**magnets especially solenoid!) **

**D1**

**D2**

**CKOVA&B**

**D2 current of 170 A**
**  ****corresponds to transport **
**  ****of 470 MeV/c particles,**
**  ****consistent with D1 setting **

## April 2 2008 FIRST PIONS SEEN IN MICE!

**Two Cherenkovs (Mississippi) situated at end of controlled area 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**

## Other Results

- Dust noticed under MICE target
- At least some dust noticed before MICE target operation
- Very unlikely dust caused by MICE target
- Vacuum pumps with moving parts often make dust
- In target tests, no dust with ~ million activations
- Will keep an eye on this
- Counting rates of ~ 30 particles/target dip
- Corresponds to about 1010 protons hitting target/dip
- Consistent with G4Beamline simulations
- Time difference between GVA1, GVA2 counters (about 40 ns) verify that most particles are protons
- GVA1, GVA2, CKOVA, CKOVB inserted into DAQ
- MICE online logbook in use

## Summary

- From MICE logbook:
-  “A small step for some mice, a giant leap for mice-kind”