Several Bunch Modes
Several Bunch Modes in the first half of fiscal year, research term A
Mode |
Bunch mode*1 |
Bunch interval*2 |
Total current |
Single bunch current*3 |
Beam injection interval*4 |
| A-mode | 203 bunches | 23.6 nsec | 100 mA |
30 seconds
|
|
| B-mode | 4 bunch train x 84 | 51.1 nsec (57.0 nsec period) |
100 mA |
40 seconds
|
|
| C-mode | 11 bunch train x 29 | 145.5 nsec (165.2 nsec period) |
100 mA |
40 seconds
|
|
| D-mode | 1/7-filling + 5 bunches | 684.3 nsec | 100 mA | 3.0 mA |
20 seconds
|
| E-mode | 2/29-filling + 26 bunches | 165.2 nsec | 100 mA | 1.4 mA |
20 seconds
|
| H-mode | 406x11/29-bunches + 1 bunch | 11.8 nsec, 1486 nsec | 100 mA | 0.6mA, 5 mA 〜 | 20 seconds
|
Several Bunch Modes in the second half of fiscal year, research term B
Mode |
Bunch mode*1 |
Bunch interval*2 |
Total current |
Single bunch current*3 |
Beam injection interval*4 |
| A-mode | 203 bunches | 23.6 nsec | 100 mA |
30 seconds
|
|
| B-mode | 4 bunch train x 84 | 51.1 nsec (57.0 nsec period) |
100 mA |
40 seconds
|
|
| C-mode | 11 bunch train x 29 | 145.5 nsec (165.2 nsec period) |
100 mA |
40 seconds
|
|
| F-mode | 1/14-filling+12bunches | 342 nsec | 100 mA | 1.6 mA |
20 seconds
|
| G-mode | 4/58-filling + 53 bunches | 83 nsec | 100 mA | 1.0 mA |
20 seconds
|
| H-mode | 406x11/29-bunches + 1 bunch | 11.8 nsec, 1486 nsec | 100 mA | 0.6mA, 5 mA 〜 |
20 seconds
|
*1 The actual bunch mode is subject to change slightly due to the instability of the electrons in the ring. The tabulated bunch interval is retained.
*2 The revolution time of the storage ring is 4.789 µsec.
The harmonic number (number of bucket) is 2436(2x2x3x7x29).
The time interval of the successive bunches (bucket interval) is 1.966 nsec.
*3 Single bunch current at injection is subject to change depending on the Storage Ring conditions.
*4 This is an average injection time interval. The time interval depends on the Storage Ring operation condition.
You can download the text file (a CSV file) which shows the time structure of the above listed bunch mode. Draw the figure of the time structure taking time (nsec) as x-axis and current (mA) as Y-axis with your own graphic software.
203 bunches
4 bunch train x 84
11 bunch train x 29
1/7-filling + 5 bunches
2/29-filling + 26 bunches
1/14-filling + 12 bunches
4/58-filling + 53 bunches
406x11/29-bunches + 1 bunch
Contact: 
, Planning and Coordination Division