Difference between revisions of "Thursday, Apr. 7: DAY Shift"

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(New page: ====Shift Status Notice==== Chance of CW beam during this shift: '''shift is on stand-by''' * TO '''must''' report to shift. * Remaining crew '''must''' stay in the area. ** Notify RC of c...)
 
 
(One intermediate revision by the same user not shown)
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 +
Return to [[Daily_Run_Plans|List of Daily Run Plans]]
 +
 
====Shift Status Notice====
 
====Shift Status Notice====
−
Chance of CW beam during this shift: '''shift is on stand-by'''
+
MCC is hopeful that CW beam could be delivered by mid-shift. '''shift is on stand-by'''
 
* TO '''must''' report to shift.
 
* TO '''must''' report to shift.
 
* Remaining crew '''must''' stay in the area.
 
* Remaining crew '''must''' stay in the area.
Line 14: Line 16:
 
====If Beam Returns====
 
====If Beam Returns====
 
* Perform Beam After Extended Downtime procedure from below
 
* Perform Beam After Extended Downtime procedure from below
−
* Perform extended ~20 minute Carbon Hole run (only '''once''')
+
<!-- * Perform extended ~20 minute Carbon Hole run (only '''once''') -->
 
* Proceed with Production data taking.
 
* Proceed with Production data taking.
−
 
+
−
 
+
 
====Beam After Extended Downtime====
 
====Beam After Extended Downtime====
 
This procedure is to be  
 
This procedure is to be  
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*** If not centered ask MCC to move beam accordingly (check board for coordinates)
 
*** If not centered ask MCC to move beam accordingly (check board for coordinates)
 
*** Repeat test with different beam position until target is centered.
 
*** Repeat test with different beam position until target is centered.
 +
* Raster Target
 +
** Start the same settings as carbon hole centering
 +
** Move to Raster Target (mask target motion!)
 +
** Ask MCC for 5uA beam with Raster ON (2x2)
 +
** Check rates and confirm they are consistent with rates seen during HOME position
 +
*** If the rates are low and consistent, then move on to next step
 +
*** If the rates are high, it may indicate the beam has an angle that causes the beam to scrape on an edge of the target
 +
**** Notify the RC
 +
**** Ask MCC to readjust bpm positions until this angle is removed
 +
**** When done, perform another Carbon Hole run just to be sure.
  
 +
<!--
 
====Extended Carbon Hole Run====
 
====Extended Carbon Hole Run====
 
This is to be performed only '''once''' and may be skipped if already performed in previous shift.
 
This is to be performed only '''once''' and may be skipped if already performed in previous shift.
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** Ask MCC for 5 &mu;A beam
 
** Ask MCC for 5 &mu;A beam
 
** Take ~20 minute run with this setting.
 
** Take ~20 minute run with this setting.
 +
 +
-->
  
 
====Production Running====
 
====Production Running====
−
For the remainder of the shift take 1 hour runs in the production configuration
+
For the remainder of the shift take 1 hour runs in the production configuration '''DVCS: Kin_48_2'''
−
DVCS: Kin_48_2<br>
+
{|
−
- 15uA<br>
+
|Beam current
−
- LH2 target<br>
+
|15 &mu;A
−
- DVCS ON<br>
+
|-
 +
|Target
 +
|LH2
 +
|-
 +
|Raster
 +
|ON (2x2mm<sup>2</sup>)
 +
|-
 +
|VDC HV (both arms)
 +
|ON
 +
|-
 +
|DVCS Calo HV
 +
|ON
 +
|-
 +
|DVCS Calo Angle;
 +
|15.185&deg;
 +
|-
 +
|DVCS Calo Distance
 +
| 2.0 m
 +
|-
 +
|LHRS Polarity
 +
|Negative
 +
|-
 +
|LHRS Momentum
 +
|3.996 GeV/c
 +
|-
 +
|LHRS Angle
 +
|20.243&deg;
 +
|-
 +
|LHRS Q1 Current
 +
|1916.640 (regulator '''OFF''')
 +
|-
 +
|LHRS DAQ Config
 +
|DVCS
 +
|-
 +
|prescaleL
 +
| PS9=1 (all others zero)
 +
|-
 +
|RHRS Polarity
 +
|Negative
 +
|-
 +
|RHRS Momentum
 +
|2.101 GeV/c
 +
|-
 +
|RHRS Angle
 +
|48.892&deg;
 +
|-
 +
|RHRS DAQ Config
 +
|RHRSadaq2
 +
|-
 +
|prescaleR
 +
| PS1=PS2=PS3=1, && PS8=200 (all others zero)
 +
|-
 +
|}
 +
 
 +
<!--
 +
 
 
  - Calo_theta= 10.1(deg), Distance = 2.5m (from target)<br/>
 
  - Calo_theta= 10.1(deg), Distance = 2.5m (from target)<br/>
−
  - LHRS=3.996 GeV/c (negative pol), angle=20.243(deg), Q1=1916.640 <!--(readout:1900)/1600/1600--> (Q1 regul.OFF)<br>
+
  - LHRS=3.996 GeV/c (negative pol), angle=20.243(deg), Q1=1916.640 (readout:1900)/1600/1600 (Q1 regul.OFF)<br>
 
  - RHRS=2.101 GeV/c (negative pol), angle=48.892(deg)<br>
 
  - RHRS=2.101 GeV/c (negative pol), angle=48.892(deg)<br>
 
  - PreScaleR : PS1=PS2=PS3=1, && PS8=200<br>
 
  - PreScaleR : PS1=PS2=PS3=1, && PS8=200<br>
 
  - PreScaleL : PS9 =1, + DVCS config.<br><br>
 
  - PreScaleL : PS9 =1, + DVCS config.<br><br>
 
  - Raster : 2x2mm^2
 
  - Raster : 2x2mm^2
 +
 +
-->

Latest revision as of 11:01, 7 April 2016

Return to List of Daily Run Plans

Shift Status Notice

MCC is hopeful that CW beam could be delivered by mid-shift. shift is on stand-by

  • TO must report to shift.
  • Remaining crew must stay in the area.
    • Notify RC of contact information.
    • Be ready to return to shift on short notice.

Shift Duties When No Beam

  • Monitor target (keep in HOME position)
  • Respond to calls and alert RC as needed.
  • Fill out shift checklist during this shift.
  • If beam is close to returning, notify the RC.

If Beam Returns

  • Perform Beam After Extended Downtime procedure from below
  • Proceed with Production data taking.

Beam After Extended Downtime

This procedure is to be

  • Harp Scans
    • Move target to HOME position (if not already there) (mask target motion!)
    • Turn VDC HV OFF for both arms.
    • Turn DVCS Calo HV OFF
    • Ask MCC for Raster OFF (check that it turns off in the scope)
    • Ask MCC to perform Harp Scans (on IHA1H04A and IHA1H04B)
      • Must have three peaks on each with a resolution of ~200-500 μm
      • Have seen a "shoulder" on the last peak before. May be acceptable if other 2 peaks are fine.
    • Ask MCC to make an ELOG with the results of the Harp Scans
  • Beam Centering on Carbon Hole Target
    • Move target to the Carbon Hole position (mask target motion!)
    • Ensure Left-HRS momentum is ~1 GeV/c
    • Set Left-HRS DAQ configuration to LeftHRSnew
      • Set prescales as ps_i = 1 for i = 1-6, and ps=0 for all others
    • Turn VDC HC OFF for both arms.
    • Turn DVCS Calo HV OFF
    • Ask MCC for Raster ON at 2x2
      • Check that it turns on in the scope, and check Raster GUI to confirm 2x2 setting
    • Ask MCC for 5 μA beam
      • Run spot_L as explained in the detailed instructions
      • If not centered ask MCC to move beam accordingly (check board for coordinates)
      • Repeat test with different beam position until target is centered.
  • Raster Target
    • Start the same settings as carbon hole centering
    • Move to Raster Target (mask target motion!)
    • Ask MCC for 5uA beam with Raster ON (2x2)
    • Check rates and confirm they are consistent with rates seen during HOME position
      • If the rates are low and consistent, then move on to next step
      • If the rates are high, it may indicate the beam has an angle that causes the beam to scrape on an edge of the target
        • Notify the RC
        • Ask MCC to readjust bpm positions until this angle is removed
        • When done, perform another Carbon Hole run just to be sure.


Production Running

For the remainder of the shift take 1 hour runs in the production configuration DVCS: Kin_48_2

Beam current 15 μA
Target LH2
Raster ON (2x2mm2)
VDC HV (both arms) ON
DVCS Calo HV ON
DVCS Calo Angle; 15.185°
DVCS Calo Distance 2.0 m
LHRS Polarity Negative
LHRS Momentum 3.996 GeV/c
LHRS Angle 20.243°
LHRS Q1 Current 1916.640 (regulator OFF)
LHRS DAQ Config DVCS
prescaleL PS9=1 (all others zero)
RHRS Polarity Negative
RHRS Momentum 2.101 GeV/c
RHRS Angle 48.892°
RHRS DAQ Config RHRSadaq2
prescaleR PS1=PS2=PS3=1, && PS8=200 (all others zero)


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