IPAC2013 - List of Authors (Kuske, P.)

Paper

Title

Page

CSR-driven Longitudinal Single Bunch Instability Thresholds

2041

P. Kuske
BESSY GmbH, Berlin, Germany

According to Bane, et al.* threshold currents should follow a quite simple scaling law. More detailed theoretical results for the underlying shielded CSR-interaction have been performed for BESSY-II and the MLS and will be presented in comparison with observations at these storage rings. It is found that there are parameter regions where the instability is weak and thus thresholds depend on damping time and synchrotron tune. Theoretical findings are in surprisingly good agreement with most of the observed instability features.
* K.L. Bane, et al., Phys. Rev. ST-AB 13, 104402 (2010)

Slides WEOAB102 [0.779 MB]

MOPFI004

The Injector Layout of BERLinPro

288

B.C. Kuske, M. Abo-Bakr, V. Dürr, A. Jankowiak, T. Kamps, J. Knobloch, P. Kuske, S. Wesch
HZB, Berlin, Germany

Funding: The Bundesministerium für Bildung und Forschung (BMBF) and the state of Berlin, Germany.
BERLinPro is an Energy Recovery Linac Project running since 2011 at the HZB in Berlin. The key component of the project is the 100mA superconducting RF photocathode gun under development at the HZB since 2010. Starting in 2016 the injector will go into operation providing 6 MeV electrons with an emittance well below 1mm mrad and bunches shorter than 4ps. 2017 the 50MeV linac will be set up and full recirculation is planned for 2018. The injector design including a dogleg merger has been finalized and is described in detail in this paper. Emphasis is laid on the final layout including collimators and diagnostics and performance simulations of two different gun cavities and first tolerance studies.

WEPME002

Fast Orbit Feedback at BESSY-II: Performance and Operational Experiences

2920

R. Müller, T. Birke, M. Diehn, D.B. Engel, B. Franksen, R. Görgen, P. Kuske, R. Lange, I. Müller, A. Schälicke, G. Schindhelm
HZB, Berlin, Germany

At the 3rd generation light source BESSY II the first phase of a fast orbit feedback system(*) has been completed and put into operation in 2012. In this first phase the aim was to achieve noise suppression in the 1Hz to several 10Hz range, mostly avoiding expensive upgrades to existing hardware, such as beam position monitors and the CAN based setpoint transmission to the power supplies. Only the power supplies were replaced with newer, faster versions. This paper describes the capability of the phase-I FOFB with respect to beam motion transient suppression, low frequency damping and high frequency noise generation as well as aspects of operational integration and stability.
* Müller, R. et. al.: Installing a Fast Orbit Feedback at BESSY.
IPAC 10, Kyoto, Japan, 23 - 28 May, 2010., p. 2749-2751

Poster WEPME002 [2.720 MB]

Paper	Title	Page
WEOAB102	CSR-driven Longitudinal Single Bunch Instability Thresholds	2041
	P. Kuske BESSY GmbH, Berlin, Germany
	According to Bane, et al.* threshold currents should follow a quite simple scaling law. More detailed theoretical results for the underlying shielded CSR-interaction have been performed for BESSY-II and the MLS and will be presented in comparison with observations at these storage rings. It is found that there are parameter regions where the instability is weak and thus thresholds depend on damping time and synchrotron tune. Theoretical findings are in surprisingly good agreement with most of the observed instability features. * K.L. Bane, et al., Phys. Rev. ST-AB 13, 104402 (2010)
	Slides WEOAB102 [0.779 MB]

MOPFI004	The Injector Layout of BERLinPro	288
	B.C. Kuske, M. Abo-Bakr, V. Dürr, A. Jankowiak, T. Kamps, J. Knobloch, P. Kuske, S. Wesch HZB, Berlin, Germany
	Funding: The Bundesministerium für Bildung und Forschung (BMBF) and the state of Berlin, Germany. BERLinPro is an Energy Recovery Linac Project running since 2011 at the HZB in Berlin. The key component of the project is the 100mA superconducting RF photocathode gun under development at the HZB since 2010. Starting in 2016 the injector will go into operation providing 6 MeV electrons with an emittance well below 1mm mrad and bunches shorter than 4ps. 2017 the 50MeV linac will be set up and full recirculation is planned for 2018. The injector design including a dogleg merger has been finalized and is described in detail in this paper. Emphasis is laid on the final layout including collimators and diagnostics and performance simulations of two different gun cavities and first tolerance studies.

WEPME002	Fast Orbit Feedback at BESSY-II: Performance and Operational Experiences	2920
	R. Müller, T. Birke, M. Diehn, D.B. Engel, B. Franksen, R. Görgen, P. Kuske, R. Lange, I. Müller, A. Schälicke, G. Schindhelm HZB, Berlin, Germany
	At the 3rd generation light source BESSY II the first phase of a fast orbit feedback system() has been completed and put into operation in 2012. In this first phase the aim was to achieve noise suppression in the 1Hz to several 10Hz range, mostly avoiding expensive upgrades to existing hardware, such as beam position monitors and the CAN based setpoint transmission to the power supplies. Only the power supplies were replaced with newer, faster versions. This paper describes the capability of the phase-I FOFB with respect to beam motion transient suppression, low frequency damping and high frequency noise generation as well as aspects of operational integration and stability. Müller, R. et. al.: Installing a Fast Orbit Feedback at BESSY. IPAC 10, Kyoto, Japan, 23 - 28 May, 2010., p. 2749-2751
	Poster WEPME002 [2.720 MB]