SRF2011 - List of Authors (Busch, M.)

Paper

Title

Page

Structural Mechanical Analysis of Superconducting CH-Cavities

162

M. Amberg
HIM, Mainz, Germany
K. Aulenbacher
IKP, Mainz, Germany
W.A. Barth, S. Mickat
GSI, Darmstadt, Germany
M. Busch, F.D. Dziuba, H. Podlech, U. Ratzinger
IAP, Frankfurt am Main, Germany

The superconducting Crossbar-H-mode (CH)-structure has been developed and tested successfully at the Institute for Applied Physics (IAP) of Frankfurt University. It is a multi-gap drift tube cavity for the acceleration of protons and ions in the low and medium energy range based on the H210-mode. At present two types of superconducting CH-structures (f = 325 MHz, β = 0.16, seven cells and f = 217 MHz, β = 0.059, 15 cells) are under construction. For the geometrical design of superconducting cavities structural mechanical simulations are essential to predict mechanical eigenmodes and the deformation of the cavity walls due to bath pressure effects and the cavity cool-down. Therefore, several static structural and modal analyses with ANSYS Workbench have been performed. Additionally, a new concept for the dynamic frequency tuning including a novel type of a piezo based bellow-tuner has been investigated to control the frequency against microphonics and Lorentz force detuning.

MOPO037

Development of Superconducting CH Cavities

169

F.D. Dziuba, M. Busch, H. Podlech, U. Ratzinger
IAP, Frankfurt am Main, Germany
M. Amberg
HIM, Mainz, Germany
K. Aulenbacher
IKP, Mainz, Germany
W.A. Barth, S. Mickat
GSI, Darmstadt, Germany

Funding: BMBF Contr. No. 06FY9089I, Helmholtz Institut Mainz (HIM), GSI
At present, two superconducting (sc) CH cavities are under development at the Institute for Applied Physics (IAP) of Frankfurt University. The construction of a sc 325 MHz CH cavity with 7 cells and an envisaged design gradient of 5 MV/m is almost finished. It is planned to test this cavity with beam at GSI Universal Accelerator (UNILAC), Darmstadt to show its performance as a candidate for the UNILAC upgrade. Furthermore, the 217 MHz CH structure with 15 accelerating cells and a real estate gradient of 5.1 MV/m will be the first cavity of the new sc continuous wave (cw) LINAC at GSI. This proposed cw LINAC is highly requested to fulfil the requirements of nuclear chemistry and especially for a competitive production of new Super Heavy Elements (SHE). To demonstrate the cavity capabilities under a realistic accelerator environment, a full performance test by injecting and accelerating a beam from the GSI High Charge Injector (HLI) is planned in 2013/14. The current status of both sc CH cavities is presented.

Poster MOPO037 [0.829 MB]

Paper	Title	Page
MOPO035	Structural Mechanical Analysis of Superconducting CH-Cavities	162
	M. Amberg HIM, Mainz, Germany K. Aulenbacher IKP, Mainz, Germany W.A. Barth, S. Mickat GSI, Darmstadt, Germany M. Busch, F.D. Dziuba, H. Podlech, U. Ratzinger IAP, Frankfurt am Main, Germany
	The superconducting Crossbar-H-mode (CH)-structure has been developed and tested successfully at the Institute for Applied Physics (IAP) of Frankfurt University. It is a multi-gap drift tube cavity for the acceleration of protons and ions in the low and medium energy range based on the H210-mode. At present two types of superconducting CH-structures (f = 325 MHz, β = 0.16, seven cells and f = 217 MHz, β = 0.059, 15 cells) are under construction. For the geometrical design of superconducting cavities structural mechanical simulations are essential to predict mechanical eigenmodes and the deformation of the cavity walls due to bath pressure effects and the cavity cool-down. Therefore, several static structural and modal analyses with ANSYS Workbench have been performed. Additionally, a new concept for the dynamic frequency tuning including a novel type of a piezo based bellow-tuner has been investigated to control the frequency against microphonics and Lorentz force detuning.

MOPO037	Development of Superconducting CH Cavities	169
	F.D. Dziuba, M. Busch, H. Podlech, U. Ratzinger IAP, Frankfurt am Main, Germany M. Amberg HIM, Mainz, Germany K. Aulenbacher IKP, Mainz, Germany W.A. Barth, S. Mickat GSI, Darmstadt, Germany
	Funding: BMBF Contr. No. 06FY9089I, Helmholtz Institut Mainz (HIM), GSI At present, two superconducting (sc) CH cavities are under development at the Institute for Applied Physics (IAP) of Frankfurt University. The construction of a sc 325 MHz CH cavity with 7 cells and an envisaged design gradient of 5 MV/m is almost finished. It is planned to test this cavity with beam at GSI Universal Accelerator (UNILAC), Darmstadt to show its performance as a candidate for the UNILAC upgrade. Furthermore, the 217 MHz CH structure with 15 accelerating cells and a real estate gradient of 5.1 MV/m will be the first cavity of the new sc continuous wave (cw) LINAC at GSI. This proposed cw LINAC is highly requested to fulfil the requirements of nuclear chemistry and especially for a competitive production of new Super Heavy Elements (SHE). To demonstrate the cavity capabilities under a realistic accelerator environment, a full performance test by injecting and accelerating a beam from the GSI High Charge Injector (HLI) is planned in 2013/14. The current status of both sc CH cavities is presented.
	Poster MOPO037 [0.829 MB]