Difference between revisions of "User:Hovanes"

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* Need an electron harp near the radiators with dynamic range of <math>10^4</math>.
 
* Need an electron harp near the radiators with dynamic range of <math>10^4</math>.
 
* We requested information from accelerator division regarding such a harp  
 
* We requested information from accelerator division regarding such a harp  
*: Such harp does not exist in the schedule
+
*# Such harp does not exist in the schedule.
*: It would cost Hall D $15K to turn IHA5C11A just before the goniometer from  <math>10^2</math> range wire-readout harp into PMT-based harp with <math>10^4</math>.
+
*# It would cost Hall D $15K to turn IHA5C11A just before the goniometer from  <math>10^2</math> range wire-readout harp into PMT-based harp with <math>10^4</math>.
*: Since we are developing our own scanning procedure for the converter harp we can put wires on the amorphous radiator and use very similar procedure to do the harp. No extra hardware will be required since we already planned for the halo PMTs, VME crate with discriminators and the motion axis controls.  
+
 
 +
* Since we are developing our own scanning procedure for the converter harp, we can put wires on the amorphous radiator and use very similar procedure to do the harp scan using the amorphous radiator stick and the halo counters. No extra hardware will be required since we already planned for the halo PMTs, VME crate with discriminators and the motion axis controls.  
  
 
* Can design a harp stick based on the [[Media:converter_harp_stick.pdf | photon harp stick]] since the stages for the two insertion devices are going to be identical.  
 
* Can design a harp stick based on the [[Media:converter_harp_stick.pdf | photon harp stick]] since the stages for the two insertion devices are going to be identical.  

Revision as of 17:27, 4 August 2013

Hovanes Egiyan

Phone : x5356

E-mail : hovanes@jlab.org


  • Need an electron harp near the radiators with dynamic range of 10^{4}.
  • We requested information from accelerator division regarding such a harp
    1. Such harp does not exist in the schedule.
    2. It would cost Hall D $15K to turn IHA5C11A just before the goniometer from 10^{2} range wire-readout harp into PMT-based harp with 10^{4}.
  • Since we are developing our own scanning procedure for the converter harp, we can put wires on the amorphous radiator and use very similar procedure to do the harp scan using the amorphous radiator stick and the halo counters. No extra hardware will be required since we already planned for the halo PMTs, VME crate with discriminators and the motion axis controls.
  • Can design a harp stick based on the photon harp stick since the stages for the two insertion devices are going to be identical.
    Reduce the spacing for the wire along the stick by ~1" to allow for four amorphous targets and and harp wires.
  • Question is if four or three wires are enough for the amorphous target stick.