Conveners
Session 4
- Larry Doolittle
Mr
Tom Powers
(Jefferson Lab)
18/10/2011, 09:50
Abstract
A number of next generation light sources have been proposed which make use of superconducting radio frequency (SRF) cavities as the primary accelerating elements. The cavities are used in injectors, standard linac configurations and energy recovered linac configurations. We will describe the general requirements for the low level RF systems used in next generation light sources...
Dr
Yuriy Pischalnikov
(FNAL)
18/10/2011, 10:10
SRF cavities required slow tuner to statically tune cavities after cool down. To compensate for dynamic detuning SRF cavities equipped with fast tuner. Review of varieties of slow/fast tuners developed for SRF cavities at different laboratories will be presented.
Nathan Usher
(National Superconducting Cyclotron Laboratory)
18/10/2011, 10:30
In the past few years, the NSCL has tested several techniques to reduce the effects of microphonics on superconducting cavities. One of these techniques is to replace the standard RF PID control with an ADRC (active disturbance rejection control). This type of controller uses a state observer to estimate the portion of the cavity feedback caused by disturbances. The control is then split...
Warren Schappert
(Fermilab)
18/10/2011, 10:50
The Lorentz force can dynamically detune pulsed Superconducting RF cavities. Considerable additional RF power can be required to maintain the accelerating gradient if no effort is made to compensate for this detuning. An adaptive feed-forward Lorentz Force Detuning (LFD) compensation algorithm developed at Fermilab is described. Systems based on this approach have been used to successfully...
