The storage ring is to store the electron beam for long period of time, and synchrotron radiation is emitted when electrons are curved in the magnetic field of storage ring.

Major parameters

Beam energy		1.2 GeV
Circumference		81.3 m
Stored beam current (nominal)		150.0 mA
Lattice		DBA (Double Bend Achromat)
Superperiod		4
Length of straight section		5.2 m × 4
Max RF voltage,  VRF		200 kV (300kV max.)
RF frequency, fRF		118.000 MHz
Harmonic number		32
Energy spread		0.066 %
Energy loss per turn (Bare ring)		65.94 keV
Synchrotron oscillation frequency, fs		13.5 kHz
Betatron tune, vx / vy		4.75/2.82

 

 

 

 

 

 

 

 

 

 

 

 

 

Magnet parametersBending magnet

Number of bending magnets	=	8
Bending radius ( ρ )	=	2.78 m
Deflection angle ( ß )	=	45.0 ° ( 0.785398 rad )
Path Length (l)	=	2.1834 m
Magnetic Field (B)	=	1.2 T
Magnet type : C-type

 

 

 

 

 

 

 

Quadrupole magnet

Number of quadrupole families

=

4

 

 

QF1

The number of QF1 magnets	=	8
Mechanical core length	=	0.290 m
Effective length	=	0.323 m
Maximum current	=	500 A
B/I slope	=	0.025738 T/m.A

 

 

 

 

 

 

QD2

The number of QD2 magnets	=	8
Mechanical core length	=	0.290 m
Effective length	=	0.323 m
Maximum current	=	500 A
B/I slope	=	0.025745 T/m.A

 

 

 

 

 

 

QF3

The number of QF3 magnets	=	8
Mechanical core length	=	0.290 m
Effective length	=	0.323 m
Maximum current	=	400 A
B/I slope	=	0.026045 T/m.A

 

 

 

 

 

 

QD4

The number of QD4 magnets	=	8
Mechanical core length	=	0.290 m
Effective length	=	0.323 m
Maximum current	=	400 A
B/I slope	=	0.026546 T/m.A

 

 

 

 

 

 

Sextupole magnet

Number of sextupole families

=

2

 

 

SF

The number of SF magnets	=	8
Mechanical core length	=	0.15 m
Maximum current	=	250 A
B/I slope	=	5.4733 T/m2.A

 

 

 

 

 

SD

The number of SD magnets	=	8
Mechanical core length	=	0.20 m
Maximum current	=	250 A
B/I slope	=	5.4885 T/m2.A

 

 

 

 

 

Steering magnet

Horizontal steering magnet

Number of horizontal steering magnet	=	16
Mechanical core length	=	0.1 m
Effective length	=	0.16 m
Maximum current	=	25 A
Pole gap	=	0.16 m
Magnetic field	=	0.080 T
Magnet type	=	H Type Solid

 

 

 

 

 

 

 

 

Vertical steering magnet

Number of Vertical steering magnet	=	12
Mechanical core length	=	0.1 m
Effective length	=	0.23 m
Maximum current	=	25 A
Pole gap	=	0.161 m
Magnetic field	=	0.038 T
Magnet type	=	H Type Solid

 

 

 

 

 

 

 

 

Injection septum magnet (S-SMI)

Bending radius ( ρ )	=	2.78 m
Deflection angle ( ß )	=	15.0 ° ( 0.2617994 rad )
Path Length (l)	=	0.8725774 m
Magnetic Field (B)	=	1.199 T
Maximum current	=	5000 - 8050 A
Pulse width	=	250 µs

 

 

 

 

 

 

 

Bump magnet(S-BMP1,S-BMP2 and S-BMP3)

Mechanical core length	=	0.295 m
Maximum current	=	700 – 2915 A