1. Weekly Monday Meeting 15/Nov/10 Anna Kolano

2. Overview Compact linac in proton therapy At the moment using degraders to vary the energy delivered to the patient Can we improve it? LIBO project

3. Up until now… Background readings Comparison of Clatterbridge cyclotron (LIBO- 62 injection), Varian and IBA parameters Getting started with GPT (tutorials) Attending seminars & lectures (e.g. CI lectures, Christie Hospital Seminar) C/C++ tutoring

4. Table Parameters Clatterbridge Cyclotron of LIBO-62 Varian /ACCEL SCIBA Energy62 MeV250 MeV230 MeV Emittance [mm mrad] (normalized) 2-3 π (1σ) 3/5 π (2σ) Or 3 π horizontal and 5 π vertical 10π (unnormaliz ed) Bunch length 13 (deg)?~1.4ns every 0.33nsecBeam off <50μsec Repetition Rate 400 Hz (LIBO SCL ?) 1 KHz Operating frequency 25.7 MHz (LIBO) 72.8MHz Energy Spread0.25% (LIBO)0.2% 0.50%

5. Next…...more reading More GPT tutorials GPT simulations of FODO,FODO + cavities etc. Complete proton therapy cyclotron parameters table Waiting for field maps of TERA LIBO cavities (so far positive feedback) Visit to Douglas cyclotron ?( within Clatterbridge Centre for Oncology and is the only proton therapy facility of its kind in the UK treating mainly eye tumours) Thank you