Tuesday, Mar. 08: DAY Shift

Go back to Daily Run Plan Daily Run Plans

Previously...

• Production data (Kin48_3)

Specific mission

• • • Elastic measurement during DAY

- 6:30 AM:
     Beam Off, Call MCC to put Hall A in Controlled Access
     Starting Ramping HRS-L magnets to 0

- 7:30 AM:Controlled Access:
    Tech in Hall, Change HRS-L Polarity, Move Angle to 40.0 deg, Set Momentum = 2.5106 GeV/c, Q1 = 1900 Amp

- 8:30 AM:
   Elastic Angle Calibration:
   DVCS Trigger s0+s2m only in HRS trigger, Elastics with Calo in current Kin_048_3 setting [here], 15 microAmp

- 9:30 AM  Escorted Access: Move Calo to 6 m, 14.0 deg    
   
- 10:00 AM Elastic Energy Calibration data  20 microAmp

- 10:30 AM Escorted Access: Move Calo to 13.1 deg

- 11:00 AM Elastic Energy Calibration data

- 11:30 AM Escorted Access:   Move Calo to 12.25 deg

- 12:00 PM Elastic Energy Calibration data

- 12:30 PM Escorted Access: Move Calo to Kin_48_2 setting:    15.184 deg, D=2.0 m,   10 micro Amp

- 01:00 PM Angle Calibration Data
   (This puts the central elastic 7.1 GeV electrons 2.0 blocks from the physical edge of the calorimeter.)

- 02:00 PM Controlled Access?
        Ramp down HRS-L
        Polarity, Angle change HRS-L to 20.244 deg to p = 3.996 GeV/c, Q1 = 1900 Amp

- 03:00 PM Production DVCS at KIN_48_2[here]

• • • Back to Production run, Kin48_2
  • After Alex's work, Compton laser will be turned OFF !
• Polarized beam at 9 uA on LH2 15 cm!
• DVCS is running kin_48_2 [here]
• LHRS is partially detuned: [here]

- LHRS=3.996GeV, Q1/Q2/Q3=1916.640(readout:1900)/1600/1600 (Q1 regul.OFF)

- PreScaleR : PS1=PS2=PS3=1, && PS8=200

- PreScaleL : PS9 =1, + DVCS config.

• beam locks: no position lock, energy lock in Arc 2: [here]
• DVCS daq configuration is [this one], we are measuring about 2% DT at 15uA.

BPM/Spot++ Check

• After beam lost for considerable time (like beam study, pass change,...)
• Ask MCC to run 5uA wth carbon hole target and make sure you can see the hole through Spot++

• Beamline commissioning how-to.

Please check more info on the white board in the Counting House ~!!

MCC Beam Team Meeting on Tuesday 1:30PM

• • Julie note from Beam Team Meeting at 1:30PM, Mar.8, 2016 at MCC.

• Purpose: Plans to run at 60uA

• Current issues:

- There is no consensus on why the beam is limited at 30 uA. 

• Ideas:

- 1/ The limitation is in the injector 
- 2/ In the RF separator

• Attempt:

- 1/ Removing/Changing Wien filter (horizontal-> vertical) ??
- 2/ Run with a magnetic separation ??

• Problem foresee:

- 1/  ?? 
- 2/ Compatible with Hall D taking data

• GMp expert inform:

- 1/ Polarization is not matter
- 2/ High current 60 uA should be deliverable for calibration and production both 4pass and 5pass

• Concluded Plan:

- Try 60 uA Thursday morning up to noon