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Figure 1

From: Advancing proton minibeam radiation therapy: magnetically focussed proton minibeams at a clinical centre

Figure 1

Schematics of the different nozzle geometries presented in this article. Abbreviations stand for: VW - vacuum window, VT - vacuum tank, IC - ionisation chamber, (X)Q - (extra) quadrupole, SM - scanning magnet, SH - snout holder. (a) Model of the PBS nozzle at ICPO. (b) New, optimised nozzle design. (c) Modification of ICPO nozzle with fully evacuated beam path (except interior of ICs). (d) Modification of ICPO nozzle without snout and field mirror and shortened path length to target. (e) Modification of ICPO nozzle with extra pair of quadrupole magnets and shifted IC2.

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