Table 3 Overview on APF linacs worldwide
From: Alternating phase focusing beam dynamics for drift tube linacs
HELIAC injector – single cavity layout | Medical Synchrotron injector [24] | ||||||
|---|---|---|---|---|---|---|---|
Status of realization | in operation | commissioned with beam | commissioned with beam | in fabrication | high-power test | designed | designed |
Mass-to-charge ratio A/z | 3 | 0.1 | 1 | 6 | 1 | 6 | 3 |
Input energy (keV/u) | 608 | 3000 | 3000 | 300 | 220 | 300 | 300 |
Output energy (keV/u) | 4000 | 40000 | 7000 | 1400 | 2000 | 1400 | 7000 |
Max. gap voltage (kV) | 350 | NA | 250 | 260 | 180 | 180 | 450 |
Length (m) | 3.4 | 1.3 | 1.5 | 4.5 (3)a | 1.5 | 3.4 | 4.3 |
Frequency (MHz) | 200 | 324 | 325 | 108 | 100 | 108 | 216 |
Duty factor (%) | 0.4 | 0.1 | 0.005–0.01 | 100 | NA | NA | NA |
Number of cells | 72 | 16 | 32 | 29 + 27 | 22 | 60 | 78 |
Aperture radius (mm) | 7 | 5 to 9 | 6 | 9 | NA | 10 | 12; 16 |
Kilpatrick factor | 1.6 | 1.8 | 1.53 | 2.5 | NA | NA | NA |
Transmission (%) | 99.6 | 98 | 98 (68)b | 100 | 80 | 100 | 100 |
Energy gain (MeV) | 10.176 | 3.7 | 4 | 6.6 | 1.96 | 6.6 | 20.1 |
Effective gradient (MV/m) | 3 | 2.8 | 2.6 | 1.5 | 1.3 | 2 | 4.7 |
Norm. transv. 90% input emit. (mm mrad) | 0.68 | NA | NA (<1.0) | 0.4 | NA (1 acceptance) | 0.4 | 0.32 |
Transv. emit. growth (%) | 25 | NA | NA | 5 | NA | 12 | 70 |
Long. 90% input emit. (keV ns/u) | 1.3 | NA | NA (<6) | 1.64 | NA (0.08 acceptance) | 1.64 | 0.88 |
Long. emit. growth (%) | 23 | NA | NA | 3 | NA | 10 | 11 |