Synchrotron

The synchrotron is used as an injector of the main storage ring. 200 MeV electron beam which is produced by linac is injected to the synchrotron and accelerated up to 1.8 GeV. This synchrotron dose not only accelerates the electron beam but also reduces the emittance to keep the 100 % transmission, especially for a top-up injection. The repetition ratio of injection is 0.5-1 Hz.

synchrotron

Enlarged picture PDF (76k) >>

1. Fundamental components
(1) Magnet system:(Bend, Quad, Sext, Septum, Kicker, Steering)
(2) RF system
(3) Vacuum system
(4) Control system
(5) Monitor systems: (BPM, DCCT, ICT, WC, SR Monitor)
and some other system.

2. Fundamental parameters

Parameters

Symbols

Value

Unit

On extraction
On injection
Energy E 1.8 0.2 GeV
Circumference C 93.52
m
Revolution frequency frev 3.206
MHz
Lattice
Modified FODO

Superperiodicity
2

Harmonic number h 156

Bending magnet type
rectangular

Bending magnet length
1.88
m
Bending magnet field B 1.25 0.1389 T
Emittance 47.1 0.581 nm.rad
Energy spread /E 7.06×10-4 7.85×10-5
Bunch length 13.7 0.486 mm
Betatron tune / 7.37/3.30

Momentum compaction 0.01079 0.01082
Energy loss per turn U0 193.5 2.95×10-3 keV/turn
Damping time // 5.73/5.80/2.92 4177/4231/2130 ms
RF voltage VRF 0.500 0.500 MV
RF frequency fRF 500.1 500.1 MHz
Bucket height (E/E)RF 0.70 3.07
%