1. Ion Accelerator Activities at VECC
(particularly, operating at low temperature)
R.K. Bhandari
Variable Energy Cyclotron Centre/DAE
AHIPA2009_October 20, 2009, Fermilab, USA

2. 224cm Variable Energy Cyclotron

3. ECR-1 at VECC

4. Beamlines layout of 224 cm VEC

5. VECC Rare Ion Beam (RIB) project
RIB project site
VECC Rare Ion Beam (RIB) project
Schematic Layout
1.3 MeV/u
Thick-target
ECR IS
100 keV/u
1.7 keV/u
LINACs 4-6
R&D with TRIUMF
184 keV/u
RIB
415 keV/u
We are here
Separator
RFQ
LINAC1
LINAC2,3
K130 Cyclotron
e-Linac
50 MeV, 2mA
Present Status
Ion-beams of Oxygen, Argon, Iron, Carbon, Nitrogen, Helium (stable isotopes) with beam energy up to 184 keV/u available from the facility
Commissioned 1st RFQ in the country. Second, RFQ commissioned in June Fully indigenous development.
Ion-beams from the facility are being used for material science experiments. 20 publications in international peer review journals in last 5 years
Linac-1 installed, Linac-2 installation underway, Linac-3 under fabrication. Linac 4-6 designed & being ordered.
R&D started on Superconducting Electron Linac development in collaboration with TRIUMF Canada

6. RIB Facility Primary beam K130 Cyclotron vault Target 1+ ion-source
HR cave - II
HR cave - I
ECRIS
Charge Breeder
3.4m RFQ
Rebuncher
Linac-1
Linac-2
Linac-3
1.5 keV/u
100 keV/u
460 keV/u
Primary beam
RIB
Dipole
magnet

7. RIB facility

8. 3.4m RFQ during installation8

9. The Proposed Mega Science facility ANURIB
(Advanced National facility for Unstable & Rare Ion Beams)
LINAC booster
Projectile Fragmentation of Exotic & Stable Beams
Ring Cyclotron
K = 600
Stripper
RIB
Stable isotope injection
Stable Beam
Separator
RFQ
Thick target
ECR Ion Source
1.3 MeV/u
1+ Ion Source
LINAC
1.5 keV/u
0.1 MeV/u
6.0 MeV/u
100 MeV/u
PFS
High energy RIB
Electron Linac
Material Science with stable & RI Beams
Spectroscopy of r-process, n-rich exotic nuclei
Nuclear Astrophysics
Experimental station
Nuclear structure, Elastic/Inelastic scattering experiments
Blue-print & components from 11th plan RIB project
New development

10. Schematic Layout of SC Electron Linac
Thermionic gun:
100 keV; 10 mA
650 MHz
NC buncher
1st multi-cell cavity;
10 MV/m, 1.3 GHz
Four 9-cell cavities, 10 MV/m each; 1.3 GHz; Q=1010
50MeV
100kW
10MeV
Gun
Injector Cryo Module
Driver
~15m
Bun
SC capture
VECC-TRIUMF MOU ( )
Phase 1
Status
Beam dynamics design completed,
presently under technical review

11. Superconducting Cyclotron
(SC)

12. VERTICAL CROSS-SECTIONAL VIEW OF THE K500 SUPERCONDUCTING CYCLOTRON

13. UPPER POLE CAP WITH POLE TIP ASSEMBLY IS BEING PLACED ON TO LOWER ASSEMBLY

14. Coil winding in progress

15. Bobbin with helium lines

16. Bobbin and radiation shield assembly

17. Insulated bobbin & radiation shield being inserted to vacuum chamber

18. Temperature
distribution in
cryostat

19. The P & I Diagram of the New Plant coupled with existing plant

20. Field Mapping Jig

21. HMI for Cryo-panels system

22. Lower RF cavity
in position

23. View from bottom of magnet showing trim coil leads.
Trim coil current leads
Outer Conducting
Spinning
Center plug
Vacuum port
Hexagonal panels
View from bottom of magnet showing trim coil leads.

24. SUPERCONDUCTING CYCLOTRON

25. SUPERCONDUCTING MAGNET WITH MAGNETIC CHANNEL AND MAIN BEAM PROBE

27. K500 SUPERCONDUCTING CYCLOTRON EXTERNAL BEAMLINE LAYOUT at VECC
Switching magnet
Bending magnet
Quadrupole
Shield wall plug
Faraday cup+Beam viewer+Pump
Steering magnet

28. Medical Cyclotron
(MC)

29. Layout of Medical Cyclotron Facility
PET
SPECT
Mat Sc. R&D
Liquid Metal Target R&D

30. ADS Cyclotron
(ADS-C)

31. ADS

32. High Current Ion Source Test Stand (100 keV, 30 mA p)

33. R & D on Injector Cyclotron

34. Superconducting RF
(SCRF)

35. Electromagnetic design of high- 5-cell Superconducting rf linac cavity has been completed.
Frequency : ~ 700 MHz
An elliptical shape equatorial arc ---- eliminates multipacting, which limits the performance of cylindrical pill-box cavities.
It makes distribution of the magnetic field along the surface more uniform and thus reduces Bpk. This in turn leads to higher accelerating gradients and lower losses.
The use of elliptic arcs in the Iris area of the cavity reduces the peak surface electric field (Epk), which alleviates field emission.

36. CRYOGENIC REQUIREMENT FOR MULTI-CELL SUPERCONDUCTING RF LINAC CAVITY AT VECC, KOLKATA
Fig.1. Computer generated view of 5-cell scrf linac cavity with cryostat
5-cell elliptical rf linac cavity with liquid helium vessel looks like above figure (Fig.1).
Maximum cavity dimension will be 0.41 m Dia. x 1.4 m Length
Maximum dimension of LHe vessel including cavity (inside) will be approximately 1.0m Dia.x 1.5 m Length. (Fig.2)

37. Thank you!