Difference between revisions of "Mar 6, 2020 Meeting Minutes"

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(Created page with "==Emails/attachments sent during the previous week== *Email chain subject name: First gas distribution simulation **Date: Feb 25, 2020 **Description: Marcy sent vacuum simulat...")
 
 
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==Emails/attachments sent during the previous week==
 
==Emails/attachments sent during the previous week==
*Email chain subject name: First gas distribution simulation
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*Email chain subject name: Ion energy consumption from Bethe's original article (1930)
**Date: Feb 25, 2020
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**Date: Mar 2-4, 2020
**Description: Marcy sent vacuum simulation data for H2 and CO for the CEBAF photogun through the y-chamber
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**Description: Josh sent a translated/transcribed version of "Theory of the passage of fast corpuscular rays through matter," which has a detailed description of ion energies after ionization
  
 
==Post-meeting notes==
 
==Post-meeting notes==
* Vacuum simulations updated for cathode shape. Data uploaded to the meeting page.
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* Josh presented ion energy analysis - GPT simulations of single bunch with fixed parameters. Simulations were made with the ionization as is, with the energy of the ion unchanged, secondary electrons on/off, and with space charge on/off.
* Josh presented calculations of ion energies using Vahedi and Surendra article.
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* Need to make bunch with long length for DC bwaem
* Joe showed a summary of the LifeSize runs for 1, 1.5, and 2.0 mA.
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* Need to make higher bunch charge to see the effects of space charge - perhaps a single bunch going through stationary ions
* Carlos showed a presentation of IBSimu simulations of GTS gun.
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* Removing NEGs makes a big difference in the electric field profile of the CEBAF photogun
* Need to add radiation monitors and ion pumps to ppt diagram (uploaded to wiki).
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* Need to check e-field for 0.1<=z<=0.25m - Cristhian showed that there is a bump in the e-field on axis in that range.
* Need to fetch solenoid and corrector magnet settings from archiver.
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* Perhaps use Maxwellian distribution of ions with 3-4eV. Cristhian will share his C++ routine for creating this Maxwellian distribution.
* Need to make simulations using real values for center of beam - i.e. from QE Scan analysis.
+
  
 
[[Ionization Effects Meetings | Return to Ionization Effects Meetings]]
 
[[Ionization Effects Meetings | Return to Ionization Effects Meetings]]
  
 
[[Weekly phone call - Mar 6, 2020 | Go to Meeting Page]]
 
[[Weekly phone call - Mar 6, 2020 | Go to Meeting Page]]

Latest revision as of 15:21, 24 March 2020

Emails/attachments sent during the previous week

  • Email chain subject name: Ion energy consumption from Bethe's original article (1930)
    • Date: Mar 2-4, 2020
    • Description: Josh sent a translated/transcribed version of "Theory of the passage of fast corpuscular rays through matter," which has a detailed description of ion energies after ionization

Post-meeting notes

  • Josh presented ion energy analysis - GPT simulations of single bunch with fixed parameters. Simulations were made with the ionization as is, with the energy of the ion unchanged, secondary electrons on/off, and with space charge on/off.
  • Need to make bunch with long length for DC bwaem
  • Need to make higher bunch charge to see the effects of space charge - perhaps a single bunch going through stationary ions
  • Removing NEGs makes a big difference in the electric field profile of the CEBAF photogun
  • Need to check e-field for 0.1<=z<=0.25m - Cristhian showed that there is a bump in the e-field on axis in that range.
  • Perhaps use Maxwellian distribution of ions with 3-4eV. Cristhian will share his C++ routine for creating this Maxwellian distribution.

Return to Ionization Effects Meetings

Go to Meeting Page