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- From: "Adelmann Andreas (PSI)" <andreas.adelmann AT psi.ch>
- To: Nicole Neveu <nneveu AT hawk.iit.edu>
- Cc: opal <opal AT lists.psi.ch>
- Subject: Re: [Opal] Thermionic Gun
- Date: Wed, 12 Aug 2015 05:36:17 +0000
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- List-archive: <https://lists.web.psi.ch/pipermail/opal/>
- List-id: The OPAL Discussion Forum <opal.lists.psi.ch>
Hello Nicole
Andreas,
Yes, I was able to simulate AWA's photoinjector (with version 1.2.0), and we had great agreement with ASTRA simulations. I ran many different cases without major issues, so that was encouraging.
However, I haven't had as much luck with the thermionic case (learning curve I would say), here is some relevant info:
- The gun is RF- 75 MV/m max field- Current density = or > 10 A/cm^2- 3.0 mm cathode- field map is 3D
Questions:
1. Will OPAL allow distributions with hard cut offs? i.e. TRISE = TFALL = 0. Pasted below is my best guess at a cylindrical distribution with radius 3.0mm. How does it look?
Dist:DISTRIBUTION, DISTRIBUTION = FLATTOP,SIGMAR = 0.003,TRISE = 0,TFALL = 0,TPULSEFWHM = ID_FWHM_TIME_FLAT / 1.0e12,CUTOFFLONG = 3.0,NBIN = 9,EMISSIONSTEPS = 10,EMISSIONMODEL = ASTRA,EKIN = 0.2,EMITTED = True,WRITETOFILE = False;
2. I've tried using the BOUNDPDESTROYFQ option to control lost particles. I get this error:OPAL{+0}> *** Parse error detected by function "Object::parse()"
OPAL{+0}> *** in line 3 of file "TGDistTest1.in" before token "=":
OPAL{+0}> OPTION,BOUNDPDESTROYFQ=10;
OPAL{+0}> Object "" has no attribute "BOUNDPDESTROYFQ".
3. 've seen these warnings a lot, even when running my AWA files. What do they mean?
Warning{+0}> reduce: there was nothing to reduce, since the masks were all false.
Warning{+0}> Could not set total charge in PartBunch::setCharge based on getTotalNum
----------------------------------------
Warning{+0}> Marker not implemented yet!
Warning{+0}> Marker not implemented yet!
Thanks!
Nicole
On Wed, Aug 5, 2015 at 12:12 PM, Adelmann Andreas (PSI) <andreas.adelmann AT psi.ch> wrote:
Hi Nicole
I am a new user of OPAL, and I've been simulating photoinjectors. When I first started it was a great help to look at the PITZ gun file that Steve Russell passed along.
Great, I hope you had success !
Now, I would like to simulate a thermionic gun. I think making the switch would mainly consist of adjustments to the beam distribution, and of course new field files. I have a good idea of where to start based on chapter 11 of the manual, but it would be great if I could see an example input file. Do you guys know of anyone who has simulated thermionic guns in OPAL?
No I do not know if anyone simulated a thermionic gun. Would that be a DC gun? What are the parameters? Basically you are right you need to come up with a realisticbeam distribution, OPAL can not simulate the emission process.Cheers Andreas
------
Dr. sc. math. Andreas (Andy) Adelmann
Staff Scientist
Paul Scherrer Institut WBBA/219 CH-5232 Villigen PSI
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On 05 Aug 2015, at 18:53, Nicole Neveu <nneveu AT hawk.iit.edu> wrote:
Nicole Neveu
Argonne National Lab
- [Opal] Thermionic Gun, Nicole Neveu, 08/05/2015
- Re: [Opal] Thermionic Gun, Adelmann Andreas (PSI), 08/05/2015
- Re: [Opal] Thermionic Gun, Nicole Neveu, 08/12/2015
- Re: [Opal] Thermionic Gun, Adelmann Andreas (PSI), 08/12/2015
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- Re: [Opal] Thermionic Gun, Adelmann Andreas (PSI), 08/12/2015
- Re: [Opal] Thermionic Gun, Nicole Neveu, 08/12/2015
- Re: [Opal] Thermionic Gun, Nicole Neveu, 08/12/2015
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- Re: [Opal] Thermionic Gun, Adelmann Andreas (PSI), 08/19/2015
- Re: [Opal] Thermionic Gun, Nicole Neveu, 08/12/2015
- Re: [Opal] Thermionic Gun, Adelmann Andreas (PSI), 08/12/2015
- Message not available
- Re: [Opal] Thermionic Gun, Adelmann Andreas (PSI), 08/12/2015
- Re: [Opal] Thermionic Gun, Nicole Neveu, 08/12/2015
- Re: [Opal] Thermionic Gun, Adelmann Andreas (PSI), 08/05/2015
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