IPAC2012 - List of Authors (Haberer, Th.)

Paper

Title

Page

Five Years of Accelerator Operation Experience at HIT

1083

A. Peters, R. Cee, E. Feldmeier, M. Galonska, Th. Haberer, K. Höppner, S. Scheloske, C. Schömers, T. Winkelmann
HIT, Heidelberg, Germany

Since spring 2007 the HIT company, a 100% daughter of the Heidelberg University Hospital, has taken over the responsibility for the operation of the first dedicated European ion beam tumour therapy facility. In 2009 the clinical operation started and since then more than 800 patients were treated in the facility. This success is based on a well-trained and highly-motivated team of physicists, engineers and technicians responsible for the 24/7 operation scheme as well as for more than 70% of the accelerator maintenance. The paper will give an overview of the operation organization reflecting the overall beam time schedule. In addition, the accelerator statistics will prove the achieved high availability of about 98% besides planned maintenance time. Furthermore, the reliability of the HIT accelerator including the gantry section will be illustrated resulting in long intervals before necessary retuning. At last, an outlook to further enhancements of the facility operation will be presented.

Slides TUOAB03 [7.526 MB]

THEPPB006

Improving the Synchrotron Performance of the Heidelberg Ionbeam Therapy Center

3243

Th. Haberer
HIT, Heidelberg, Germany

The HIT linac-synchrotron-system routinely delivers pencil beams to the dose delivering rasterscanning devices at 3 treatment rooms, including the worldwide first scanning ion gantry, and 1 experimental cave. At HIT the quality-assured library of pencil beam parameters covers roughly 100.000 combinations of the ion, energy, intensity and beam size. Each patient-specific treatment plan defines a subset of these pencil beams being subsequently requested during the dose delivery. Aiming at shortened irradiation times an upgrade program making heavy use of feed-back mechanisms is under way. Driven by patient-specific data out of the scanning beam dose delivery process central synchrotron components are coupled to the therapy control system in order to tailor the beam characteristics in real-time to the clinical requirements. The paper will discuss the functional upgrades and report about the impact on the medical application at HIT.

THPPD002

The First Magnetic Field Control (B-Train) to Optimize the Duty Cycle of a Synchrotron in Clinical Operation

3503

E. Feldmeier, R. Cee, M. Galonska, Th. Haberer, A. Peters, S. Scheloske
HIT, Heidelberg, Germany

In December 2011 the Heidelberg Ion Therapy Center started to use the magnetic field feedback control for its clinical operation. Therewith the magnetic field deviation of the ramped magnets in the synchrotron depending on eddy currents and hysteresis are no longer in effect. Waiting times on the flattop and the "chimney" in the recovery phase of the synchrotron cycle are no longer necessary. The efficiency of the accelerator is increased by more than 20\% and the treatment time shortens accordingly. The core of the magnetic feedback system is a real time measuring system of the magnetic field with extremely high precision.

Paper	Title	Page
TUOAB03	Five Years of Accelerator Operation Experience at HIT	1083
	A. Peters, R. Cee, E. Feldmeier, M. Galonska, Th. Haberer, K. Höppner, S. Scheloske, C. Schömers, T. Winkelmann HIT, Heidelberg, Germany
	Since spring 2007 the HIT company, a 100% daughter of the Heidelberg University Hospital, has taken over the responsibility for the operation of the first dedicated European ion beam tumour therapy facility. In 2009 the clinical operation started and since then more than 800 patients were treated in the facility. This success is based on a well-trained and highly-motivated team of physicists, engineers and technicians responsible for the 24/7 operation scheme as well as for more than 70% of the accelerator maintenance. The paper will give an overview of the operation organization reflecting the overall beam time schedule. In addition, the accelerator statistics will prove the achieved high availability of about 98% besides planned maintenance time. Furthermore, the reliability of the HIT accelerator including the gantry section will be illustrated resulting in long intervals before necessary retuning. At last, an outlook to further enhancements of the facility operation will be presented.
	Slides TUOAB03 [7.526 MB]

THEPPB006	Improving the Synchrotron Performance of the Heidelberg Ionbeam Therapy Center	3243
	Th. Haberer HIT, Heidelberg, Germany
	The HIT linac-synchrotron-system routinely delivers pencil beams to the dose delivering rasterscanning devices at 3 treatment rooms, including the worldwide first scanning ion gantry, and 1 experimental cave. At HIT the quality-assured library of pencil beam parameters covers roughly 100.000 combinations of the ion, energy, intensity and beam size. Each patient-specific treatment plan defines a subset of these pencil beams being subsequently requested during the dose delivery. Aiming at shortened irradiation times an upgrade program making heavy use of feed-back mechanisms is under way. Driven by patient-specific data out of the scanning beam dose delivery process central synchrotron components are coupled to the therapy control system in order to tailor the beam characteristics in real-time to the clinical requirements. The paper will discuss the functional upgrades and report about the impact on the medical application at HIT.

THPPD002	The First Magnetic Field Control (B-Train) to Optimize the Duty Cycle of a Synchrotron in Clinical Operation	3503
	E. Feldmeier, R. Cee, M. Galonska, Th. Haberer, A. Peters, S. Scheloske HIT, Heidelberg, Germany
	In December 2011 the Heidelberg Ion Therapy Center started to use the magnetic field feedback control for its clinical operation. Therewith the magnetic field deviation of the ramped magnets in the synchrotron depending on eddy currents and hysteresis are no longer in effect. Waiting times on the flattop and the "chimney" in the recovery phase of the synchrotron cycle are no longer necessary. The efficiency of the accelerator is increased by more than 20\% and the treatment time shortens accordingly. The core of the magnetic feedback system is a real time measuring system of the magnetic field with extremely high precision.