View source for Fall 2016 optic plans

Back to [[https://hallaweb.jlab.org/wiki/index.php/Run_Plan_%28DVCS3%29 Fall 2016 DVCS run plan]]

'''Assuming we only need one detune 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) ====

<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> 1h   </td>
<td> 20 uA DIS with sieve slit on optics foils</td>
</tr>
<tr>
<td> L2 (no sieve)</td>
<td> 1h </td>
<td> Delta Elastic on LH2, 20 uA</td>
</tr>
</table>
<br>
<br><br>

----
'''One pass program
'''<br>

E<SUB>beam</SUB>= 2.217 GeV<br>
LHRS &theta;<SUB>e</SUB>=16.5 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!. 
&nbsp;<br>
Energy  and position lock should be on. <br>
<font color=red> The DVCS calorimeter HVs  need to be off</font>
 
==== Step L1: Procedure with Sieve-slit (DIS) ====<br>
The DVCS calorimeter HVs need to be off<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>
Q<SUP>2</SUP>= 0.182 GeV<SUP>2</SUP><br>
W=? 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'></td>
    <td >LEFT Q1 Current</td>
    <td >Q1</td>
    <td >Estimated Rates</td>
    <td >estimated time</td>
    <td >actual rates</td>
    <td width=20% >run number</td>
    <td width=20% >#event in the run</td>
  </tr>
  <tr>
    <td height=15 style='height:15.0pt'>Target</td>
    <td >[A]</td>
    <td >detune</td>
    <td >[Hz] at 20 uA</td>
    <td >&nbsp;</td>
    <td >[Hz] at 20 uA</td>
    <td >&nbsp;</td>
    <td >&nbsp;</td>
  </tr>
  <tr>
    <td height=29 style='height:29.0pt'>Optics<br> no raster</td>
    <td class=xl66 align=right> ? </td>
    <td class=xl69 align=right>1.000</td>
    <td align=right>300</td>
    <td class=xl67 width=97 style='width:97pt'>1h (or at least 100k
      events)</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
 <tr height=15 style='height:15.0pt'>

</table>

==== Step L2: Delta Scan with Proton Elastic (sieve) ====<br>

The DVCS calorimeter HVs need to be off<br>

If the LHRS goes to a higher momentum setting, Q2 and Q3 need to
be cycled.
&nbsp;<br>

LHRS &theta;<SUB>e</SUB>=16.5 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>
Run duration 5-7 minutes each from Winter 2016 experience (we want at least 10k electron events).


<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=91 style='width:91pt'>LQ1 Current [A]</td>
  <td class=xl72 width=65 style='width:65pt'>Q1 detune</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'>2.1</td>
  <td class=xl68 align=right>?</td>
  <td align=right>1</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'>2.06</td>
  <td class=xl68 align=right>?</td>
  <td align=right>1</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'>2.02</td>
  <td class=xl68 align=right>?</td>
  <td align=right>1</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'>1.98</td>
  <td class=xl68 align=right>?</td>
  <td align=right>1</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'>1.94</td>
  <td class=xl68 align=right>?</td>
  <td align=right>1</td>
  <td class=xl69 align=right>0.96</td>
  <td> &nbsp;</td>
  <td> &nbsp;</td>
</tr>
</table>

&nbsp;<br>