CYCLOTRONS 2010 - List of Keywords (scattering)

Paper	Title	Other Keywords	Page
TUM1CIO01	Towards the 2MW Cyclotron and Latest Developments at PSI	cyclotron, proton, target, extraction	275
	M. Seidel PSI, Villigen, Switzerland
	PSI operates a cyclotron based high intensity proton accelerator routinely at an average beam power of 1.3MW. With this power the facility is at the worldwide forefront of high intensity proton accelerators. An upgrade program is under way to ensure high operational reliability and push the intensity to even higher levels. The beam current is practically limited by losses at extraction and the resulting activation of accelerator components. Further intensity upgrades are only possible if the relative losses can be lowered in proportion, thus keeping absolute losses at a constant level. The basic upgrade path involves the reduction of space charge induced extraction losses by implementing improved RF systems and resonators in both cyclotrons. The paper describes the ongoing upgrade program, achievements that were realized since the last cyclotron conference and several operational experiences and difficulties that were observed during routine operation.
	Slides TUM1CIO01 [8.697 MB]

FRM1CCO05	Advocacy for a Dedicated 70 MeV Proton Therapy Facility	proton, cyclotron, quadrupole, focusing	416
	A. Denker, C.R. Rethfeldt, J.R. Röhrich HZB, Berlin, Germany D. Cordini, J. Heufelder, R. Stark, A. Weber Charite, Berlin, Germany
	Since 1998 we treated more then 1500 patients with eye tumors at the HZB cyclotron with a 68 MeV proton beam. The 5 years follow up shows a tumor control rate of more then 96%. The combination of a CT/MRT based planning and excellent physical beam conditions like 2 nA in the scattered proton beam, a 0.94 mm distal dose fall-off and a dose penumbra of 2.1 mm offers the opportunity to keep side effects on a lowest level. However all new medical proton facilities are equipped with accelerators delivering beams of 230 MeV and more. While this is needed for deep seated tumors, a lot of physical and medical compromises have to be accepted for the treatment of shallow seated tumors like eye melanomas. Hence, we suggest a 70 MeV proton therapy facility. It should be equipped with a horizontal beam line and can have optionally a vertical line for more complicated cases under anesthetics or for biological experiments. By the use of PBO Lab and MCNPX beam line concepts and a radio-protecting architecture are designed. In Germany we see a definite need for a single low energy facility which guarantees the excellence of proton therapy for the need of 80 million people.
	Slides FRM1CCO05 [1.881 MB]

Paper

Title

Other Keywords

Page

TUM1CIO01

Towards the 2MW Cyclotron and Latest Developments at PSI

cyclotron, proton, target, extraction

275

M. Seidel
PSI, Villigen, Switzerland

PSI operates a cyclotron based high intensity proton accelerator routinely at an average beam power of 1.3MW. With this power the facility is at the worldwide forefront of high intensity proton accelerators. An upgrade program is under way to ensure high operational reliability and push the intensity to even higher levels. The beam current is practically limited by losses at extraction and the resulting activation of accelerator components. Further intensity upgrades are only possible if the relative losses can be lowered in proportion, thus keeping absolute losses at a constant level. The basic upgrade path involves the reduction of space charge induced extraction losses by implementing improved RF systems and resonators in both cyclotrons. The paper describes the ongoing upgrade program, achievements that were realized since the last cyclotron conference and several operational experiences and difficulties that were observed during routine operation.

Slides TUM1CIO01 [8.697 MB]

FRM1CCO05

Advocacy for a Dedicated 70 MeV Proton Therapy Facility

proton, cyclotron, quadrupole, focusing

416

A. Denker, C.R. Rethfeldt, J.R. Röhrich
HZB, Berlin, Germany
D. Cordini, J. Heufelder, R. Stark, A. Weber
Charite, Berlin, Germany

Since 1998 we treated more then 1500 patients with eye tumors at the HZB cyclotron with a 68 MeV proton beam. The 5 years follow up shows a tumor control rate of more then 96%. The combination of a CT/MRT based planning and excellent physical beam conditions like 2 nA in the scattered proton beam, a 0.94 mm distal dose fall-off and a dose penumbra of 2.1 mm offers the opportunity to keep side effects on a lowest level. However all new medical proton facilities are equipped with accelerators delivering beams of 230 MeV and more. While this is needed for deep seated tumors, a lot of physical and medical compromises have to be accepted for the treatment of shallow seated tumors like eye melanomas. Hence, we suggest a 70 MeV proton therapy facility. It should be equipped with a horizontal beam line and can have optionally a vertical line for more complicated cases under anesthetics or for biological experiments. By the use of PBO Lab and MCNPX beam line concepts and a radio-protecting architecture are designed. In Germany we see a definite need for a single low energy facility which guarantees the excellence of proton therapy for the need of 80 million people.

Slides FRM1CCO05 [1.881 MB]