Longitudinal phase space tracking in dual energy storage ring
Posted: 04 Nov 2019, 16:04
Dear All,
I have a dual energy storage ring, one ring at lower energy and another at higher energy connected by RF. I tried single particle tracking and found that after certain passes, particle gets lost. However, applying "magnify" element after the RF cavity ( to make transverse co-ordinates zero, Michael's suggestion) , it does wok. Going from 55 MeV (Lower ring, fixed energy value) to 500 MeV (Higher ring), and applying "magnify" element after RF cavity to make transverse co-ordinates zero does not work ( 0 particle transmitted after 0 turns). It does work up to higher energy about 455 MeV( High energy ring). What may be the reason behind this problem?
Question 1 : Is this a right way to make transverse co-ordinates (x,x') zero and do tracking? What if I want to create a beam distribution and do tracking for many passes?
I tried this but unable to get the periodic solution.
My ring has Line=(Low energy ring(55 MeV), accelerating RF, Harmonic RF1, High energy ring(455 meV), Bunching RF, Decelerating RF,Harmonic RF2)
Question 2 : During a bunched beam tracking with many particle, First I calculate one loop transfer map through the whole ring and apply the stability condition. This gives me the phase advance and finally the longitudinal twiss parameters which is used to create an initial beam distribution. Is this a right way to create a beam distribution in bunched beam tracking with many particles? I used an assumed value of beam emittance.
Actually there are two possible cases, first tracking with synchrotron radiation off and second with radiation on.
Here, I want to study longitudinal beam dynamics stability in my system with radiation off.
Is there anything wrong with my set up?
Thank you,
Bhawin
I have a dual energy storage ring, one ring at lower energy and another at higher energy connected by RF. I tried single particle tracking and found that after certain passes, particle gets lost. However, applying "magnify" element after the RF cavity ( to make transverse co-ordinates zero, Michael's suggestion) , it does wok. Going from 55 MeV (Lower ring, fixed energy value) to 500 MeV (Higher ring), and applying "magnify" element after RF cavity to make transverse co-ordinates zero does not work ( 0 particle transmitted after 0 turns). It does work up to higher energy about 455 MeV( High energy ring). What may be the reason behind this problem?
Question 1 : Is this a right way to make transverse co-ordinates (x,x') zero and do tracking? What if I want to create a beam distribution and do tracking for many passes?
I tried this but unable to get the periodic solution.
My ring has Line=(Low energy ring(55 MeV), accelerating RF, Harmonic RF1, High energy ring(455 meV), Bunching RF, Decelerating RF,Harmonic RF2)
Question 2 : During a bunched beam tracking with many particle, First I calculate one loop transfer map through the whole ring and apply the stability condition. This gives me the phase advance and finally the longitudinal twiss parameters which is used to create an initial beam distribution. Is this a right way to create a beam distribution in bunched beam tracking with many particles? I used an assumed value of beam emittance.
Actually there are two possible cases, first tracking with synchrotron radiation off and second with radiation on.
Here, I want to study longitudinal beam dynamics stability in my system with radiation off.
Is there anything wrong with my set up?
Thank you,
Bhawin