Hello, Dear all.
Now, I using the element of RFCA.
I want to change momentum of the beam after passing element of RFCA.
So, I am set the "change_momentum_p0=1" comment in lattice file.
But It has error. The error message is "item is ambiguous -- specify more of the item name"
How to fixing this error? Could you give me some comment?
I attached the file. Please check.
Sincerely yours.
change_momentum_p0=1 in RFCA
Moderators: cyao, michael_borland
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change_momentum_p0=1 in RFCA
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Re: change_momentum_p0=1 in RFCA
Ji-Gwang,
There is a typo in your file. You have BODY_FOCUS_MODEL = SRS). The ")" is not correct.
See the attached file.
--Michael
There is a typo in your file. You have BODY_FOCUS_MODEL = SRS). The ")" is not correct.
See the attached file.
--Michael
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Re: change_momentum_p0=1 in RFCA
Dear Michael
Thank you for your reply. But Still don't change the value of energy after passing RFCA.
What's the problem?
Sincerely yours.
Hwang Ji-Gwang
Thank you for your reply. But Still don't change the value of energy after passing RFCA.
What's the problem?
Sincerely yours.
Hwang Ji-Gwang
-
- Posts: 1951
- Joined: 19 May 2008, 09:33
- Location: Argonne National Laboratory
- Contact:
Re: change_momentum_p0=1 in RFCA
Ji-Gwang,
Your definition of RFCA doesn't specify the a value for phase. Try PHASE=90 for on-crest acceleration.
Per the manual: "The phase convention is as follows, assuming a positive rf voltage: PHASE=90 is the crest for acceleration. PHASE=180 is the stable phase for a storage ring above transition without energy losses."
--Michael
Your definition of RFCA doesn't specify the a value for phase. Try PHASE=90 for on-crest acceleration.
Per the manual: "The phase convention is as follows, assuming a positive rf voltage: PHASE=90 is the crest for acceleration. PHASE=180 is the stable phase for a storage ring above transition without energy losses."
--Michael
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- Posts: 42
- Joined: 21 Jan 2010, 02:27
Re: change_momentum_p0=1 in RFCA
Thank you for your help. your answer is correct.
sincerely yours.
Hwang, Ji-Gwang
sincerely yours.
Hwang, Ji-Gwang