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| NewSUBARU storage ring |
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11 m long undulator |
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For industrial use of the synchrotron radiation in the soft X-ray regime, the 1.5 GeV electron storage ring of "NewSUBARU" has been constructed in the SPring-8 site in 1998 and operated by LASTI (Laboratory of Advanced Science and Technology for Industry), University of Hyogo through the cooperation of SPring-8. The ring is racetrack-type with the circumference of 119 m and has two 14 m and four 2.6 m straight sections. In the long straight sections the 11-m long undulator and an optical-klystron FEL have been installed. The 1 GeV electron beam from the SPring-8 linac is injected into the NewSUBARU ring.
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| beam energy |
1.0 - 1.5 GeV |
| circumference |
118.731m |
| lattice |
DBA+Inverse Bending mag. |
| bending magnets |
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radius of curvature |
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magnetic field |
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| 12 |
| 3.2168 m |
| 1.035 T (@1GeV) |
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| inverse bending magnets |
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radius of curvature |
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magnetic field |
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| 6 |
| -3.2168 m |
| 1.035 T (@1GeV) |
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| quadrupole magnets |
| bending cell |
| short straight section |
| long straight section |
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| 2 families (total 16) |
| 2 families (total 24) |
| 3 families (total 12) |
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| length of straight section |
| short straight section |
| long straight section |
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beta functions
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| short straight section |
| long straight section |
| BM (0 deg.) |
| BM (10 deg.) |
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| horizontal / vertical |
| 8.61 m / 8.66 m |
| 1.49 m / 8.05 m |
| 3.32 m / 24.49 m |
| 1.91 m / 26.88 m |
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alpha
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| short straight section |
| long straight section |
| BM (0 deg.) |
| BM (10 deg.) |
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| horizontal / vertical |
| 0／0 |
| 0／0 |
| 0.78／2.74 |
| -0.18／3.52 |
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gamma
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| short straight section |
| long straight section |
| BM (0 deg.) |
| BM (10 deg.) |
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| horizontal / vertical |
| 0.12 m-1 / 0.12 m-1 |
| 0.67 m-1 / 0.12 m-1 |
| 0.48 m-1 / 0.34 m-1 |
| 0.54 m-1 / 0.50 m-1 |
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| dispersion |
| short straight section |
| long straight section |
| BM (0 deg.) |
| BM (10 deg.) |
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| betatron functions and dispersion (alpha=1.3E-3, user time) |
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| betatron tune |
horizontal : 6.30 / vertical: 2.23 |
| energy spread |
0.04 % (@1.0GeV) |
| momentum compaction (alpha) |
1.3x10-3 |
| chromaticity |
horizontal : 2.9 / vertical: 5.6 |
| maximum stored current |
< 500 mA |
| natural emittance |
37 nmrad (@1.0GeV) |
| coupling |
1 % |
| revolution frequency / revolution time |
2.53 MHz / 396 ns |
| RF frequency |
499.955 MHz |
| harmonic number |
198 |
| maximum acceleration voltage |
500 kV |
| radiation loss (per turn) |
33.4 keV (@1GeV) |
| critical photon energy / wavelength |
0.7 keV / 1.8nm (@1GeV) |
| lifetime |
12 hrs (@1GeV, 100mA), 18 hrs (@1.5GeV, 100mA) |
| bunch length (sigma) (@1GeV) |
33ps (normal user time), 2.4ps (Low alpha operation) |
| beam size (sigma) |
| short straight section |
| long straight section |
| BM (0 deg.) |
| BM (10 deg.) |
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| horizontal / vertical (@1GeV) |
| 5.6X10-4 m / 5.9X10-5 m |
| 2.3X10-4 m / 5.7X10-5 m |
| 1.8X10-4 m / 9.2X10-5 m |
| 1.6X10-4 m / 8.5X10-5 m |
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angular divergence (sigma)
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| short straight section |
| long straight section |
| BM (0 deg.) |
| BM (10 deg.) |
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| horizontal / vertical (@1GeV) |
| 6.6X10-5 / 6.8X10-6 |
| 1.6X10-4 / 7.0X10-6 |
| 2.1X10-4 / 4.4X10-6 |
| 2.3X10-4 / 4.7X10-6 |
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| stability of the beam orbit |
horizontal : <50 micron, vertical : <<50 micron |
| vacuum pressure of the storage ring |
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| 10-8 Pa~10-6 Pa |
| 10-9 Pa~10-8 Pa |
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Last modified
2016-02-25 14:04
