Magnets for the Heavy-Ion Cancer Therapy Accelerator Facility (HICAT) for the Clinic in Heidelberg

Abstract

The Heavy Ion Cancer Therapy Accelerator facility (HICAT) for the university hospital in Heidelberg is now under construction and will be completed in 2006. The facility consists of 2 ion sources, low-energy beam transfer lines, a linear accelerator, a medium energy beam transfer line, a synchrotron, high-energy beam transfer lines, and 3 treatment locations. One of the treatment locations will be equipped with a gantry. All magnets were designed at GSI. The design of the magnets will be reviewed. Wherever possible, a conservative design approach was used. Special design efforts were necessary for the huge 90 gantry dipole and the tiny internal quadrupoles for the IH-type drift tube linac, so that prototypes of these magnets were built and tested. The design, construction, and measurements of the quadrupoles for the IH-type drift tube linac will also be discussed in detail.Index Terms-Accelerator magnets, biomedical applications of nuclear radiation.

Cylindrical Circular and Elliptical, Toroidal Circular and Elliptical Multipoles Fields, Potentials and their Measurement for Accelerator Magnets

“…An equivalent simpler formula found by rewriting Eq. ( 21) as cosh(kw) = k ν=0 t kν cosh ν w, k = 0, 1, ..., n. (24) is given here:…”

“…coil probes which follow the magnets curvature. These were used to measure SIS18 magnets [23] the magnets of HIT [24] or CNAO [25]. Skew multipoles can not be derived from these measurements.…”

Permanent-magnet quadrupoles for an interdigital H -mode drift tube linear accelerator: Optimization code and adjustable magnet design

“…Traditional electromagnets are difficult to keep small. The Heidelberg ion therapy (HIT) accelerator pushed standard magnet fabrication techniques to new limits to produce electromagnets with a small enough outer diameter to fulfill the power requirements [3]. This type of magnet design has also been used in other DTLs [4].…”

Analysis of losses in superconducting magnets based on the Nb3Sn Rutherford cable configuration for future gantries

“…The radiation dose delivered to the target volume is maximized and the dose to the surrounding normal tissues is minimized [1][2][3]. Many facilities use rotatable gantry beamlines to direct the proton or ion beam to the patient from different angles [4].…”