J-PARC Center Users Office
2-4 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
Webmaster:<web-staff@j-parc.jp>
2-4 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
Webmaster:<web-staff@j-parc.jp>
Main parameters
Main Parameters of 3 GeV Rapid-cycling Synchrotoron
| Parameter | value | |
| Circumference | 348.333 m | |
| Average Radius | 55.44 m | |
| Injection Energy | 0.181/0.4 GeV | |
| Extraction Energy | 3.0 GeV | |
| Particle Per Pulse | 8.3 x 1013 | |
| Revolution Period | ||
| at Injection | 1.629 μs | |
| at Extraction | 1.196 μs | |
| Repetition Rate | 25 Hz | |
| Ramping Pattern | Sinusoid | |
| Injection | ˜ 500 μs | |
| Acceleration | 20ms | |
| Decreasing Field | 20ms | |
| Average Current | 333 μA | |
| Circulating Current | ||
| at Injection | 8.2 A | |
| at Extraction | 11.1 A | |
| Bunching Factor | ||
| at Injection | ||
| fundamental | 0.3 | |
| with 2nd harmonics | 0.4 | |
| at Extraction | 0.056 | |
| for 3GeV users | 0.2 | |
| for 50GeV ring | 0.3 | |
If you want to know more detailed parameter, please refer here (pdf file)
ACCELERATOR TECHNICAL DESIGN REPORT FOR J-PARC Table 10.2.1.2
