2011 Particle Accelerator Conference - List of Authors (Heid, O.)

Paper

Title

Page

Solid State Direct Drive RF LINAC: High Power Experimental Program

1056

T.J.S. Hughes, M. Back, R. Fleck, M. Hergt, R. Irsigler, T. Kluge, J. Sirtl
Siemens AG, Erlangen, Germany
O. Heid
Siemens AG, Healthcare Technology and Concepts, Erlangen, Germany

We report on a 150MHz λ/4 coaxial resonator driven by 32 integrated class F RF power modules according to our direct drive concept [1,2]. Electric fields of 60MV/m at the resonator gap have been reached, which correspond to 80kW RF power. This power level has been achieved at 160V DC supply voltage, significantly less than the component limits. The observed power and Q values can be explained by a simple equivalent circuit. The model predicts that 64 modules at 160V DC supply voltage may provide 170kW RF power, and that 250V DC supply voltage should yield 400kW. The corresponding 134MV/m gap E field may not be reachable due to vacuum flashover.
* Heid O., Hughes T. THPD002, IPAC10, Kyoto, Japan
** Hergt M et al, 2010 IEEE International Power Modulator and High Voltage Conf., Atlanta GA, USA
*** Heid O., Hughes T. THP068, LINAC10, Tsukuba, Japan

WEP207

Progress Towards A Novel Compact High Voltage Electrostatic Accelerator

1876

P. Beasley, O. Heid
Siemens AG, Healthcare Technology and Concepts, Erlangen, Germany

A proof-of-principle demonstrator system has been successfully built and tested. It is based on a Cockcroft-Walton (or Greinacher) cascade but has been developed using a different design philosophy and using modern materials. This can then enable this compact accelerator configuration to operate at much higher voltage gradients. This paper explores the progress made to-date and future plans to utilize the technology to develop one such concept for an energy efficient 10 MV, 100 microamp, tandem proton accelerator, with less than a 2 square meter footprint .

THOAS2

Solid State RF Power - The route to 1W per Euro Cent

2047

O. Heid
Siemens AG, Healthcare Technology and Concepts, Erlangen, Germany
T.J.S. Hughes
Siemens AG, Erlangen, Germany

In most particle accelerators RF power is a decisive design constraint due to high costs and relative inflexibility of power sources based on electron beams i.e. Klystrons, Magnetrons, Tetrodes etc. At VHF/UHF frequencies the transition to solid state devices promises to fundamentally change the situation. Recent progress brings 1 Watt per Euro cent installed cost within reach. We present a Silicon Carbide semiconductor solution utilising the Solid State Direct Drive technology [*,**,***] at unprecedented efficiency, power levels and power densities. The proposed solutions allows retrofitting of existing RF solutions and opens the route to novel accelerator designs.
* Heid O., Hughes T. THPD002, IPAC10, Kyoto, Japan
** Hergt M et al, 2010 IEEE International Power Modulator and High Voltage Conf., Atlanta GA, USA
*** Heid O., Hughes T. THP068, LINAC10, Tsukuba, Japan

Slides THOAS2 [1.776 MB]

Paper	Title	Page
TUP117	Solid State Direct Drive RF LINAC: High Power Experimental Program	1056
	T.J.S. Hughes, M. Back, R. Fleck, M. Hergt, R. Irsigler, T. Kluge, J. Sirtl Siemens AG, Erlangen, Germany O. Heid Siemens AG, Healthcare Technology and Concepts, Erlangen, Germany
	We report on a 150MHz λ/4 coaxial resonator driven by 32 integrated class F RF power modules according to our direct drive concept [1,2]. Electric fields of 60MV/m at the resonator gap have been reached, which correspond to 80kW RF power. This power level has been achieved at 160V DC supply voltage, significantly less than the component limits. The observed power and Q values can be explained by a simple equivalent circuit. The model predicts that 64 modules at 160V DC supply voltage may provide 170kW RF power, and that 250V DC supply voltage should yield 400kW. The corresponding 134MV/m gap E field may not be reachable due to vacuum flashover. * Heid O., Hughes T. THPD002, IPAC10, Kyoto, Japan Hergt M et al, 2010 IEEE International Power Modulator and High Voltage Conf., Atlanta GA, USA * Heid O., Hughes T. THP068, LINAC10, Tsukuba, Japan

WEP207	Progress Towards A Novel Compact High Voltage Electrostatic Accelerator	1876
	P. Beasley, O. Heid Siemens AG, Healthcare Technology and Concepts, Erlangen, Germany
	A proof-of-principle demonstrator system has been successfully built and tested. It is based on a Cockcroft-Walton (or Greinacher) cascade but has been developed using a different design philosophy and using modern materials. This can then enable this compact accelerator configuration to operate at much higher voltage gradients. This paper explores the progress made to-date and future plans to utilize the technology to develop one such concept for an energy efficient 10 MV, 100 microamp, tandem proton accelerator, with less than a 2 square meter footprint .

THOAS2	Solid State RF Power - The route to 1W per Euro Cent	2047
	O. Heid Siemens AG, Healthcare Technology and Concepts, Erlangen, Germany T.J.S. Hughes Siemens AG, Erlangen, Germany
	In most particle accelerators RF power is a decisive design constraint due to high costs and relative inflexibility of power sources based on electron beams i.e. Klystrons, Magnetrons, Tetrodes etc. At VHF/UHF frequencies the transition to solid state devices promises to fundamentally change the situation. Recent progress brings 1 Watt per Euro cent installed cost within reach. We present a Silicon Carbide semiconductor solution utilising the Solid State Direct Drive technology [,,*] at unprecedented efficiency, power levels and power densities. The proposed solutions allows retrofitting of existing RF solutions and opens the route to novel accelerator designs. Heid O., Hughes T. THPD002, IPAC10, Kyoto, Japan Hergt M et al, 2010 IEEE International Power Modulator and High Voltage Conf., Atlanta GA, USA * Heid O., Hughes T. THP068, LINAC10, Tsukuba, Japan
	Slides THOAS2 [1.776 MB]