17-21 July 2017
Santiago de Compostela, Facultade de Química
Europe/Madrid timezone

High-Gradient RF laboratory at IFIC for medical applications

18 Jul 2017, 16:30
15m
Aula Química Física (Facultad Química (USC))

Aula Química Física

Facultad Química (USC)

Oral parallel contribution Física Médica Nuclear Physics II

Speaker

Dr. Daniel Esperante Pereira (IFIC - U. de Valencia / CSIC)

Description

General interest has been shown over the last years for compact and more affordable facilities for hadron-therapy. The High-Gradient (HG) know-how and technology for normal-conducting accelerating RF (Radio-Frequency) electron linac (linear accelerator) structures recently developed for projects such as CLIC (CERN), has raised the achievable accelerating gradient from 20-30 MV/m up to 100-120 MV/m. This gain has come through a better understanding of the high-power RF vacuum arcs or breakdowns (BD) phenomena, the development of quantitative HG RF design methods and refinements in fabrication techniques. This can allow for more compact linacs also for protons, which is potentially important in the new trend in hadron-therapy of using linacs able to provide protons of 70-230 MeV or light ions of 100-400 MeV/u. Linacs are of particular interest for medical applications because they can provide a high degree of flexibility for treatment, such as running at 100-400 Hz pulse rate and pulse-to-pulse beam energy (and intensity) variations. This kind of accelerator is very well suited to treat moving organs with 4D multi-painting spot scanning technique. Project studies like TULIP are taking advantage of these developments and pursuing medical linacs of reduced size. HG operation, which is carried out under ultra-high vacuum conditions (~10-9 mbar), is limited by the BD phenomena and is characterized by the BD-Rate (BDR) or number of BD per pulse and meter. New fresh structures initially operate at a reduced performance and must be conditioned through extended high-power rf operation until the maximum operational gradient is reached. This process is a time consuming, and consequently costly task (> 350 million pulses) which is important to understand and reduce. The IFIC HG-RF laboratory is designed to host a high-power and high-repetition rate facility for testing S-Band (2.9985 GHz) normal-conducting RF structures. This facility will allow the development, RF conditioning and studies of the BD phenomena in HG structures.

Primary author

Dr. Daniel Esperante Pereira (IFIC - U. de Valencia / CSIC)

Co-authors

Dr. Angeles Faus-Golfe (IFIC) Ms. Anna Vnuchenko (IFIC) Mr. César Blanch (IFIC) Mr. Llácer Cantero Carles (IFIC) Mr. Manel Usó Izquierdo (IFIC) Dr. Nuria Catalán-Lasheras (CERN) Dr. Walter Wuensch (CERN)

Presentation Materials

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