Large momentum acceptance gantry

for CNAO

9/19/2015 1 CNAO gantry

Dr. Dejan Trbojevic Brookhaven National Laboratory

Replacing the large magnet

9/19/2015 CNAO gantry 2

Concepts

9/19/2015 CNAO gantry 3

ULICE gantry

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5

Gantry room

Gantry room

Modern Hadrontherapy Gantry Developments 6

Even shorter and save one shelf/support

9/19/2015 CNAO gantry 7

6.8

41

66

m

0.5

m

3.7

91

3 m

2.7

60

7 m

Magnified x10 =±10cm

9/19/2015 CNAO gantry 8

9/19/2015 CNAO gantry 9

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Beam line

Synchrotron Phase shifter stepper

Match 1

Match 2

Rotator

Gantry

• In the mobile isocenter gantry the rotator must

be placed between a “first” fixed dipole to launch

the dispersion and the gantry.

• With a closed dispersion gantry the rotator can

be positioned upstream the “first” dipole (which

then turns into an achromat).

• Thus, one rotator, many gantries!

• Longer/Narrower footprint

9/19/2015 CNAO gantry 11

9/19/2015 CNAO gantry 12

PVS

COUCH

BPIS

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The ULICE gantry: Beam Based Alignment

Measure where the beam is and put the isocenter there…

CNAO treatment room #2: PPS and PVS

One robot arm with two “tools”

Isocenter position moves and is not easy to measure/verify/define

Thank you for your attention

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