Name: Budker Seminar: Crispin Contreras
Start: 2018-12-10T17:00:00-06:00
End: 2018-12-10T18:30:00-06:00
Location: Users Center

Budker Seminar: Crispin Contreras

Monday, 10 December 2018 - 17:00

Monday, 10 December 2018

17:00 Refreshments
Refreshments
17:00 - 17:20
Room: Meeting Room
17:20 Resonance Control for Superconducting RF Cavities - Crispin Contreras Martinez (Michigan State University)
Resonance Control for Superconducting RF Cavities
- Crispin Contreras Martinez (Michigan State University)
17:20 - 18:30
Room: Meeting Room Superconducting (SC) linear accelerators (linacs) can provide high power proton and ion beams in either continuous wave (CW) or pulsed mode operation. In most applications, beam loading in CW mode is low and SC cavities can be efficiently operated with moderate level of RF power. However, this results in high loaded Q_L and additional measures should be implemented to control resonance frequency. In the case of cavities operated in the pulsed mode the main source of detuning is due to radiation pressure (Lorentz Force). In both cases, CW and pulsed, the detuning can be compensated by using more RF power which can be costly if the detuning is large. Additionally, if the RF sources can’t provide enough power to compensate for the detuning the cavity will not be able to maintain the accelerating gradient which will result in operational downtime. A cost-effective approach to mitigating the detuning has been shown with the use of piezo actuators for fast detuning. My research plan is focused on understanding the limitations of fast tuners based on piezo actuators including control algorithms and development of a reliable piezo tuning systems with a long lifetime for applications both in CW or pulsed linacs