Quasi-Alvarez drift-tube linac structures for heavy ion therapy accelerator facilities

Khalvati, M. R.; Bencini, Vittorio; Ramberger, S.

doi:10.1103/physrevaccelbeams.26.022001

Cited by 1 publication

(2 citation statements)

References 21 publications

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“…The QA-DTL is a modified Alvarez DTL with only one drift tube (DT) out of three containing a quadrupole. Since not all DTs in the QA-DTL structure contain magnets, their radial and longitudinal dimensions are reduced thus increasing the achievable effective shunt impedance [9,10].…”

Section: Qa-dtl Designmentioning

confidence: 99%

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Comparison of 352 MHz linac structures for injection into an ion therapy accelerator

Nikitovic,

Torims,

Vretenar

2024

J. Phys.: Conf. Ser.

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In the frame of ongoing initiatives for the design of a new generation of synchrotron-based accelerators for cancer therapy with ion beams, an analysis of linac designs has been started, to address a critical element with a strong impact on the performance and cost of the accelerator. The goal is to identify alternatives at lower cost and a similar or possibly smaller footprint than the standard 217 MHz injector presently used in all carbon therapy facilities in Europe. As an additional feature, a new linac design can be tailored to produce radioisotopes for treatment and diagnostics in parallel with operation as a synchrotron injector. In this paper, the attractive option of moving to 352 MHz frequency is analyzed, to a profit of reliable mechanical designs already developed for protons and of the cost savings that can be obtained using Radiofrequency (RF) power sources klystrons with a much lower cost per Watt than tubes or solid-state units. The paper is presenting a Quasi-Alvarez Drift Tube Linac (QA-DTL) version of an injector linac for carbon ions at q/A=1/3 and compare it with Inter-Digital H-Mode DTL (IH-DTL) designs. The option of a Separated-tank IH-DTL structure (S-IH-DTL) is also discussed, along with a standard IH-DTL, both at 352 MHz. Finally, a DTL design at 352 MHz for the injection of fully stripped helium ions into the synchrotron is presented.

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Section: Qa-dtl Designmentioning

confidence: 99%

“…The periodicity factor 𝑛 needs to be chosen carefully, as a trade-off between beam transmission and gradient of magnets. The QA-DTL structure is most efficient when the periodicity factor is set to 𝑛=2 [9,10]. Hence, the considered QA-DTL structure contains a set of superperiods with 𝑛=2 (Fig.…”

Section: Qa-dtl Designmentioning

confidence: 99%