Requirements for ADSR accelerators

The requirements for a high-proton-intensity accelerator connected to an ADSR can be summarized as follows:

Table 6.3. Characteristics of the SIN cyclotron.

Accelerator

Energy

590 MeV

Average intensity

1.8 mA

Beam power

1 MW

Pre-injector

Energy

0.8 MeV

Intensity

12mA

Injector cyclotron

Energy

72 MeV

Intensity

2 mA

Frequency

50.6 MHz

Injection radius

40.6 cm

Extraction radius

350 cm

Magnet power

20 kW

RF power dissipation

0.4MW

Extraction efficiency

99.97%

Total RF power

2 x 0.18 MW

Sector cyclotron

Energy

590 MeV

Intensity

1.8 mA

Frequency

50.63 MHz

Injection radius

210 cm

Extraction radius

445 cm

Magnetic field

2.09T

Energy gain/turn

2.46 MeV

Magnet power

1 MW

RF power dissipation

1.3MW

Total RF power

2.1 MW

Radio frequency

Beam power

1 MW

Total RF power

2.61 MW

Total line-to-RF losses

1.35MW

those for power reactors. Another event specific to accelerators is the occurrence of short-duration trips where the beam is lost. If the duration of a trip exceeds the time it takes for the subcritical system to reach thermal equilibrium after an input power variation (temperature relaxation time) the ADSR structures will be submitted to thermal stress and, thus, increased fatigue. The reduction of the frequency and duration of trips is therefore an important request for high-intensity accelerators.

• The energy efficiency of the accelerator complex should be reasonably high.