vepp-5 poject present status
DESCRIPTION
VEPP-5 POJECT Present Status. BINP, Novosirisk, Russia. R.Gromov. Layout of VEPP-5 injection complex. Forinjector parameters. Storage Ring Parameters. Beam Parameters in Storage Ring. Parameters of. accelerating structure. Frequency. f. 2855.5. МГц. q. 2. p. /. 3. - PowerPoint PPT PresentationTRANSCRIPT
VEPP-5 POJECTPresent Status
R.Gromov
BINP, Novosirisk, Russia
Layout of VEPP-5 injection complex
Forinjector parameters
Beams energy MeV 510
Electrons per bunch Positrons per bunch
1011
109
Repetition rate Hz 50 Energy spread for e- Energy spread for e+
% %
±1 ±3
RF frequency MHz 2856 Klystron pulse power MW 63
Storage Ring ParametersEnergy MeV 510
Circumference m 27.40
Repetition rate MGz 10.9375
Injection rate Hz 50
Extraction rate Hz 1 - 4
Dumping time Vertical Horizontal Longitudinal
ms
17.5 11.3 11.9
Beam Parameters in Storage RingInjection beam
Energy spread Emittance Length
% mrad·cm cm
1 1.5 2.5
Extraction beam
Energy spread x-emittance z-emittance Length
% mkrad·cm mkrad·cm cm
0.07 2.3 0.5 0.4
Frequency f 2855.5 МГцField mode Quality factor Q0 1.32104
Gruop velocity Vgr 0.021CShunt impedance Rsh 51 МОм /мTime constant of accelerating structure
0 = 2Q0/ 1.47 мксDamping factor of accelerating structure = 1/(0Vgr ) 0.108 1/мLength of AS +2 WTT
L 2.93 мDamping factor L 0.316Filling time Tf =L/ Vgr 0.465 мкс
Parameters of accelerating structure
Input power
To acceleratingstructure Resonator 2
Resonator 1
Diameter of the cavity D 196 ммHeight of the cavity H 346.6 ммMain frequency f0 2856 МГцBand width f 5 МГц f/H 2.75 МГц/ммQuality factor Q0 53200Coupling coefficient with supplywaveguide
5.84
Time constant of the cavity 5.93 мксTime constant of loaded cavity TC = 0/(1+)
0.87 мкс
Moment of phase jump by 1800 3 мксRF pulse duration 3.5 мксMultiply factor of voltage К0 2.67
The dependence of RF-amplitude along the AS at different time moment
zaSLEDshgen e
v
ztPRtzE
2-
‹р 0 -2=),( ,
at shR - shunt impedance,
- attenuation coefficient, t,PtP SLEDSLED 0 0 - incoming RF power from SLED
The dependence of wake field amplitude along the ASat different time moment
zL
Lzvt-te
vt-tze
tt
IRtzE
grb
tt
grbz
b
shbA
b
at 0
at 1
0at 1
at 0
2
2 sin
,0
0
at bt - bunch incoming time,
A0 - time constant,
grv - group velocity ,
- longitudinal bunch size.
The dependence of accelerating field along the ASat different time moment
)t,zEcost,zEt,zE bgentot
The dependence of particles energyat their incoming time
L
tot dzt,zEtU0
Short beam test results
Max. beam energy MeV 105
Average accelerating rate MeV/m 35
Repetition rate Hz 50
Beam puls length ns 2
Electrons per bunch 2·1010
Energy spread % ±0.5
88МэВ 103МэВ