ERL2013 - List of Authors (Arnold, A.)

Paper

Title

Page

Progress of SRF Gun Development and Operation at the ELBE Accelerator

11

J. Teichert, A. Arnold, H. Büttig, U. Lehnert, P.N. Lu, P. Michel, P. Murcek, R. Schurig, H. Vennekate, R. Xiang
HZDR, Dresden, Germany
T. Kamps, J. Rudolph
HZB, Berlin, Germany
P. Kneisel
JLAB, Newport News, Virginia, USA
I. Will
MBI, Berlin, Germany

Superconducting RF photo guns are suitable candidates for electron injectors in future free electron lasers and energy recovery linacs. For the radiation source ELBE an SRF gun was build and put into operation. During long-term tests, the operation of normal-conducting photocathodes in the superconducting cavity has been successfully demonstrated. At moderate average currents of some hundreds of μA the Cs2Te photocathodes possess excellent lifetime. The gun's acceleration gradient is the key parameters for beam emittance and the maximum achievable bunch charge of the gun. Therefore two new cavities with higher performance were developed, built and treated. The final tests of these cavities are ongoing. An upgraded cryomodule with an integrated superconducting solenoid was built.

Slides WG101 [4.767 MB]

WG503

Dark Current in Superconducting RF Photoinjectors – Measurements and Mitigation

75

J. Teichert, A. Arnold, P.N. Lu, P. Murcek, G.S. Staats, H. Vennekate, R. Xiang
HZDR, Dresden, Germany
R. Barday, T. Kamps
HZB, Berlin, Germany

Unwanted beam can cause beam losses and may produce acute or chronic damages of the accelerator. Furthermore it can considerably disturb experiments or increase its back-ground. The operation of the superconducting RF photo gun at the ELBE accelerator has delivered the first experimental information on that topic. It was found, that dark current is an important issue, similar to that normal conducting RF photo injectors. In the presentation the measurement of dark current, its properties and analysis will be shown and we will discuss ways for mitigation, especially the construction of a dark current kicker.

Slides WG503 [2.864 MB]

Paper	Title	Page
WG101	Progress of SRF Gun Development and Operation at the ELBE Accelerator	11
	J. Teichert, A. Arnold, H. Büttig, U. Lehnert, P.N. Lu, P. Michel, P. Murcek, R. Schurig, H. Vennekate, R. Xiang HZDR, Dresden, Germany T. Kamps, J. Rudolph HZB, Berlin, Germany P. Kneisel JLAB, Newport News, Virginia, USA I. Will MBI, Berlin, Germany
	Superconducting RF photo guns are suitable candidates for electron injectors in future free electron lasers and energy recovery linacs. For the radiation source ELBE an SRF gun was build and put into operation. During long-term tests, the operation of normal-conducting photocathodes in the superconducting cavity has been successfully demonstrated. At moderate average currents of some hundreds of μA the Cs2Te photocathodes possess excellent lifetime. The gun's acceleration gradient is the key parameters for beam emittance and the maximum achievable bunch charge of the gun. Therefore two new cavities with higher performance were developed, built and treated. The final tests of these cavities are ongoing. An upgraded cryomodule with an integrated superconducting solenoid was built.
	Slides WG101 [4.767 MB]

WG503	Dark Current in Superconducting RF Photoinjectors – Measurements and Mitigation	75
	J. Teichert, A. Arnold, P.N. Lu, P. Murcek, G.S. Staats, H. Vennekate, R. Xiang HZDR, Dresden, Germany R. Barday, T. Kamps HZB, Berlin, Germany
	Unwanted beam can cause beam losses and may produce acute or chronic damages of the accelerator. Furthermore it can considerably disturb experiments or increase its back-ground. The operation of the superconducting RF photo gun at the ELBE accelerator has delivered the first experimental information on that topic. It was found, that dark current is an important issue, similar to that normal conducting RF photo injectors. In the presentation the measurement of dark current, its properties and analysis will be shown and we will discuss ways for mitigation, especially the construction of a dark current kicker.
	Slides WG503 [2.864 MB]