Difference between revisions of "Fall 2016 optic plans"

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Line 18: Line 18:
 
<td>L1 (sieve)</td>
 
<td>L1 (sieve)</td>
 
<td> 1h30  </td>
 
<td> 1h30  </td>
−
<td> 20 uA DIS with sieve slit on optics foils (C single foil if poor resolution at first)</td>
+
<td> 20 &mu;A DIS with sieve slit on optics foils</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
 
<td> L2 (NO sieve)</td>
 
<td> L2 (NO sieve)</td>
 
<td> 1h - 1h30 </td>
 
<td> 1h - 1h30 </td>
−
<td> Delta Scan Elastic on LH2, 20 uA</td>
+
<td> Delta Scan Elastic on LH2, 20 &mu;A</td>
−
</tr>
+
 
</table>
 
</table>
 
<br>
 
<br>
Line 34: Line 33:
  
 
E<SUB>beam</SUB>= 2.217 GeV<br>
 
E<SUB>beam</SUB>= 2.217 GeV<br>
−
LHRS &theta;<SUB>e</SUB>=16.5 deg <br>
+
LHRS &theta;<SUB>e</SUB>=17.5 deg <br>
 
LHRS DAQ: S2+Cer (T3), Use LHRNEW for DAQ configuration. See [[https://hallaweb.jlab.org/wiki/index.php/How_to_HRS_/_DVCS#Changing_from_the_.22DVCS.22_run_type_to_the_.22LHRSnew.22_run_type section 5.2 in DVCS shift howto]] for complete procedure!.  
 
LHRS DAQ: S2+Cer (T3), Use LHRNEW for DAQ configuration. See [[https://hallaweb.jlab.org/wiki/index.php/How_to_HRS_/_DVCS#Changing_from_the_.22DVCS.22_run_type_to_the_.22LHRSnew.22_run_type section 5.2 in DVCS shift howto]] for complete procedure!.  
 
&nbsp;<br>
 
&nbsp;<br>
Line 40: Line 39:
 
<font color=red> The DVCS calorimeter HVs  need to be off</font><br><br>
 
<font color=red> The DVCS calorimeter HVs  need to be off</font><br><br>
 
   
 
   
−
==== Step L1: Procedure with Sieve-slit (DIS) ====<br>
+
==== Step L1: DIS on optics (WITH Sieve) ====<br>
 
<font color=red> The DVCS calorimeter HVs need to be off</font><br>
 
<font color=red> The DVCS calorimeter HVs need to be off</font><br>
 
P<sub>0</sub>= 1.0 [GeV/c] (DIS) <br>
 
P<sub>0</sub>= 1.0 [GeV/c] (DIS) <br>
Line 48: Line 47:
 
Beam current : 20 &mu;A<br>
 
Beam current : 20 &mu;A<br>
 
NO Raster<br>
 
NO Raster<br>
−
Q<SUP>2</SUP>= 0.182 GeV<SUP>2</SUP><br>
+
Q<SUP>2</SUP>= 0.205 GeV<SUP>2</SUP><br>
−
W= 1.727 GeV<br>
+
W= 1.720 GeV<br>
  
 
<table border="1" cellpadding="2" cellspacing="1" width:90%'>
 
<table border="1" cellpadding="2" cellspacing="1" width:90%'>
Line 80: Line 79:
 
</table>
 
</table>
 
<br>
 
<br>
−
==== Step L2: Delta Scan with Proton Elastic (NO sieve) ====<br>
+
==== Step L2: Delta Scan elastic (NO sieve) ====<br>
  
 
<font color=red> The DVCS calorimeter HVs need to be off</font><br>
 
<font color=red> The DVCS calorimeter HVs need to be off</font><br>
Line 87: Line 86:
 
Simply leave the regulation ON for Q1.
 
Simply leave the regulation ON for Q1.
 
&nbsp;<br>
 
&nbsp;<br>
−
LHRS &theta;<SUB>e</SUB>=16.5 deg <br>
+
LHRS &theta;<SUB>e</SUB>=17.5 deg <br>
 
We are going to need to check the rates before we take these data, to be safe. But from experience from Winter 2016, 20 &mu;A should be ok.<br>
 
We are going to need to check the rates before we take these data, to be safe. But from experience from Winter 2016, 20 &mu;A should be ok.<br>
−
Run duration: 6-8 minutes each (It was enough during Winter 2016 experience) (We want at least 10k electron events).<br>
+
Run duration: 5-6 minutes each (It was enough during Winter 2016 experience) (We want at least 10k electron events in the LHRS).<br>
 +
Raster ON.
 +
 
 +
 
 +
<table border="1" cellpadding="1" cellspacing="1" width=90%'>
 +
<tr><td colspan="6"> Target: 15cm LH2</td></tr>
 +
<tr>
 +
  <td height=15 class=xl72 width=65 style='height:15.0pt;width:65pt'>k' [GeV]</td>
 +
  <td class=xl72 width=65 style='width:65pt'>Delta P [%]</td>
 +
  <td class=xl72 width=95 style='width:95pt'>run number</td>
 +
  <td class=xl72 width=131 style='width:131pt'>number of trigger</td>
 +
</tr>
 +
<tr height=15 style='height:15.0pt'>
 +
  <td height=15 class=xl70 align=right style='height:15.0pt'>2.078</td>
 +
  <td align=right>1.04</td>
 +
  <td> &nbsp;</td>
 +
  <td> &nbsp;</td>
 +
</tr>
 +
<tr height=15 style='height:15.0pt'>
 +
  <td height=15 class=xl70 align=right style='height:15.0pt'>2.038</td>
 +
  <td align=right>1.02</td>
 +
  <td> &nbsp;</td>
 +
  <td> &nbsp;</td>
 +
</tr>
 +
<tr height=15 style='height:15.0pt'>
 +
  <td height=15 class=xl70 align=right style='height:15.0pt'>1.998</td>
 +
  <td class=xl71 align=right>1.00</td>
 +
  <td> &nbsp;</td>
 +
  <td> &nbsp;</td>
 +
</tr>
 +
<tr height=15 style='height:15.0pt'>
 +
  <td height=15 class=xl70 align=right style='height:15.0pt'>1.958</td>
 +
  <td class=xl69 align=right>0.98</td>
 +
  <td> &nbsp;</td>
 +
  <td> &nbsp;</td>
 +
</tr>
 +
<tr height=15 style='height:15.0pt'>
 +
  <td height=15 class=xl70 align=right style='height:15.0pt'>1.918</td>
 +
  <td class=xl69 align=right>0.96</td>
 +
  <td> &nbsp;</td>
 +
  <td> &nbsp;</td>
 +
</tr>
 +
</table>
 +
 
 +
&nbsp;<br>
 +
 
 +
 
 +
----
 +
 
 +
----
 +
 
 +
 
 +
 
 +
==== Alternative Proposition of LHRS run plan at larger angle (still needs to be integrated with RHRS run plan) ====
 +
 
 +
<table border="1" cellpadding="2" cellspacing="1" width:90%'>
 +
<tr>
 +
<td> LHRS step </td>
 +
<td> Approximate beam time</td>
 +
<td> Goals</td>
 +
</tr>
 +
<tr>
 +
<td>L1 (sieve)</td>
 +
<td> 4h  </td>
 +
<td> 20 &mu;A DIS with sieve slit on optics foils</td>
 +
</tr>
 +
<tr>
 +
<td> L2 (NO sieve)</td>
 +
<td> 1h30 </td>
 +
<td> Delta Scan Elastic on LH2, 20 &mu;A</td>
 +
</table>
 +
<br>
 +
<br><br>
 +
 
 +
----
 +
'''One pass program
 +
'''<br>
 +
 
 +
E<SUB>beam</SUB>= 2.217 GeV<br>
 +
LHRS &theta;<SUB>e</SUB>=35 deg <br>
 +
LHRS DAQ: S2+Cer (T3), Use LHRNEW for DAQ configuration. See [[https://hallaweb.jlab.org/wiki/index.php/How_to_HRS_/_DVCS#Changing_from_the_.22DVCS.22_run_type_to_the_.22LHRSnew.22_run_type section 5.2 in DVCS shift howto]] for complete procedure!.
 +
&nbsp;<br>
 +
Energy  and position lock should be on. <br>
 +
<font color=red> The DVCS calorimeter HVs  need to be off</font><br><br>
 +
 +
==== Step L1: DIS on optics (WITH Sieve) ====<br>
 +
<font color=red> The DVCS calorimeter HVs need to be off</font><br>
 +
P<sub>0</sub>= 1.0 [GeV/c] (DIS) <br>
 +
If the LHRS goes to a new higher momentum setting,  Q2 and Q3 need to
 +
be cycled.<br>
 +
Simply leave the regulation ON for Q1.<br>
 +
Beam current : 20 &mu;A<br>
 +
NO Raster<br>
 +
Q<SUP>2</SUP>= 0.82 GeV<SUP>2</SUP><br>
 +
W= 1.537 GeV<br>
 +
 
 +
<table border="1" cellpadding="2" cellspacing="1" width:90%'>
 +
  <tr height=15 style='height:15.0pt'>
 +
    <td height=15 style='height:15.0pt'>Target</td>
 +
    <td >Estimated Rates [Hz]</td>
 +
    <td >Estimated time</td>
 +
    <td >Actual rates [Hz]</td>
 +
    <td width=20% >Run number</td>
 +
    <td width=20% >#Event in the run</td>
 +
  </tr>
 +
  <tr>
 +
    <td height=29 style='height:29.0pt'>Optics</td>
 +
    <td align=right>25</td>
 +
    <td class=xl67 width=97 style='width:97pt'>3h (or at least 100k electron
 +
      events)</td>
 +
      <td>&nbsp;</td>
 +
      <td>&nbsp;</td>
 +
      <td>&nbsp;</td>
 +
  </tr>
 +
  <tr>
 +
    <td height=29 style='height:29.0pt'>C single foil</td>
 +
    <td align=right>5</td>
 +
    <td class=xl67 width=97 style='width:97pt'>1h (or at least 72k electron events)</td>
 +
    <td>&nbsp;</td>
 +
    <td>&nbsp;</td>
 +
    <td>&nbsp;</td>
 +
  </tr>
 +
 
 +
</table>
 +
<br>
 +
==== Step L2: Delta Scan elastic (NO sieve) ====<br>
 +
 
 +
<font color=red> The DVCS calorimeter HVs need to be off</font><br>
 +
If the LHRS goes to a higher momentum setting, Q2 and Q3 need to
 +
be cycled.<br>
 +
Simply leave the regulation ON for Q1.
 +
&nbsp;<br>
 +
LHRS &theta;<SUB>e</SUB>=35 deg <br>
 +
We are going to need to check the rates before we take these data, to be safe. But from experience from Winter 2016, 20 &mu;A should be ok with prescale ps3=1.<br>
 +
Run duration: 5 minutes each (We want at least 10k electron events in the LHRS).<br>
 
Raster ON.
 
Raster ON.
  
Line 102: Line 235:
 
  </tr>
 
  </tr>
 
  <tr height=15 style='height:15.0pt'>
 
  <tr height=15 style='height:15.0pt'>
−
   <td height=15 class=xl70 align=right style='height:15.0pt'>2.1</td>
+
   <td height=15 class=xl70 align=right style='height:15.0pt'>1.614</td>
 
   <td align=right>1.04</td>
 
   <td align=right>1.04</td>
 
   <td> &nbsp;</td>
 
   <td> &nbsp;</td>
Line 108: Line 241:
 
  </tr>
 
  </tr>
 
  <tr height=15 style='height:15.0pt'>
 
  <tr height=15 style='height:15.0pt'>
−
   <td height=15 class=xl70 align=right style='height:15.0pt'>2.06</td>
+
   <td height=15 class=xl70 align=right style='height:15.0pt'>1.584</td>
 
   <td align=right>1.02</td>
 
   <td align=right>1.02</td>
 
   <td> &nbsp;</td>
 
   <td> &nbsp;</td>
Line 114: Line 247:
 
</tr>
 
</tr>
 
<tr height=15 style='height:15.0pt'>
 
<tr height=15 style='height:15.0pt'>
−
   <td height=15 class=xl70 align=right style='height:15.0pt'>2.02</td>
+
   <td height=15 class=xl70 align=right style='height:15.0pt'>1.553</td>
 
   <td class=xl71 align=right>1.00</td>
 
   <td class=xl71 align=right>1.00</td>
 
   <td> &nbsp;</td>
 
   <td> &nbsp;</td>
Line 120: Line 253:
 
</tr>
 
</tr>
 
  <tr height=15 style='height:15.0pt'>
 
  <tr height=15 style='height:15.0pt'>
−
   <td height=15 class=xl70 align=right style='height:15.0pt'>1.98</td>
+
   <td height=15 class=xl70 align=right style='height:15.0pt'>1.521</td>
 
   <td class=xl69 align=right>0.98</td>
 
   <td class=xl69 align=right>0.98</td>
 
   <td> &nbsp;</td>
 
   <td> &nbsp;</td>
Line 126: Line 259:
 
</tr>
 
</tr>
 
  <tr height=15 style='height:15.0pt'>
 
  <tr height=15 style='height:15.0pt'>
−
   <td height=15 class=xl70 align=right style='height:15.0pt'>1.94</td>
+
   <td height=15 class=xl70 align=right style='height:15.0pt'>1.49</td>
 
   <td class=xl69 align=right>0.96</td>
 
   <td class=xl69 align=right>0.96</td>
 
   <td> &nbsp;</td>
 
   <td> &nbsp;</td>

Latest revision as of 14:29, 5 October 2016

Back to [Fall 2016 DVCS run plan]

Assuming we only need one setting for the new Q1.

This proposition has been made on the basis of Winter 2016 run plan, and experience of what happened and what was really used.


Proposition of LHRS run plan (still needs to be integrated with RHRS run plan)

LHRS step Approximate beam time Goals
L1 (sieve) 1h30 20 μA DIS with sieve slit on optics foils
L2 (NO sieve) 1h - 1h30 Delta Scan Elastic on LH2, 20 μA




One pass program

Ebeam= 2.217 GeV
LHRS θe=17.5 deg
LHRS DAQ: S2+Cer (T3), Use LHRNEW for DAQ configuration. See [section 5.2 in DVCS shift howto] for complete procedure!.  
Energy and position lock should be on.
The DVCS calorimeter HVs need to be off

==== Step L1: DIS on optics (WITH Sieve) ====
The DVCS calorimeter HVs need to be off
P0= 1.0 [GeV/c] (DIS)
If the LHRS goes to a new higher momentum setting, Q2 and Q3 need to be cycled.
Simply leave the regulation ON for Q1.
Beam current : 20 μA
NO Raster
Q2= 0.205 GeV2
W= 1.720 GeV

Target Estimated Rates [Hz] Estimated time Actual rates [Hz] Run number #Event in the run
Optics 300 1h (or at least 100k electron events)      
C single foil 60 20 min (or at least 72k electron events)      


==== Step L2: Delta Scan elastic (NO sieve) ====

The DVCS calorimeter HVs need to be off
If the LHRS goes to a higher momentum setting, Q2 and Q3 need to be cycled.
Simply leave the regulation ON for Q1.  
LHRS θe=17.5 deg
We are going to need to check the rates before we take these data, to be safe. But from experience from Winter 2016, 20 μA should be ok.
Run duration: 5-6 minutes each (It was enough during Winter 2016 experience) (We want at least 10k electron events in the LHRS).
Raster ON.


Target: 15cm LH2
k' [GeV] Delta P [%] run number number of trigger
2.078 1.04    
2.038 1.02    
1.998 1.00    
1.958 0.98    
1.918 0.96    

 



Alternative Proposition of LHRS run plan at larger angle (still needs to be integrated with RHRS run plan)

LHRS step Approximate beam time Goals
L1 (sieve) 4h 20 μA DIS with sieve slit on optics foils
L2 (NO sieve) 1h30 Delta Scan Elastic on LH2, 20 μA




One pass program

Ebeam= 2.217 GeV
LHRS θe=35 deg
LHRS DAQ: S2+Cer (T3), Use LHRNEW for DAQ configuration. See [section 5.2 in DVCS shift howto] for complete procedure!.  
Energy and position lock should be on.
The DVCS calorimeter HVs need to be off

==== Step L1: DIS on optics (WITH Sieve) ====
The DVCS calorimeter HVs need to be off
P0= 1.0 [GeV/c] (DIS)
If the LHRS goes to a new higher momentum setting, Q2 and Q3 need to be cycled.
Simply leave the regulation ON for Q1.
Beam current : 20 μA
NO Raster
Q2= 0.82 GeV2
W= 1.537 GeV

Target Estimated Rates [Hz] Estimated time Actual rates [Hz] Run number #Event in the run
Optics 25 3h (or at least 100k electron events)      
C single foil 5 1h (or at least 72k electron events)      


==== Step L2: Delta Scan elastic (NO sieve) ====

The DVCS calorimeter HVs need to be off
If the LHRS goes to a higher momentum setting, Q2 and Q3 need to be cycled.
Simply leave the regulation ON for Q1.  
LHRS θe=35 deg
We are going to need to check the rates before we take these data, to be safe. But from experience from Winter 2016, 20 μA should be ok with prescale ps3=1.
Run duration: 5 minutes each (We want at least 10k electron events in the LHRS).
Raster ON.


Target: 15cm LH2
k' [GeV] Delta P [%] run number number of trigger
1.614 1.04    
1.584 1.02    
1.553 1.00    
1.521 0.98    
1.49 0.96    

 

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