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

224cm Variable Energy Cyclotron

ECR-1 at VECC

Beamlines layout of 224 cm VEC

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 2009-12 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 2008. 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

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

RIB facility

3.4m RFQ during installation 8

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

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 (2008-12) Phase 1 Status Beam dynamics design completed, presently under technical review

Superconducting Cyclotron (SC)

VERTICAL CROSS-SECTIONAL VIEW OF THE K500 SUPERCONDUCTING CYCLOTRON

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

Coil winding in progress

Bobbin with helium lines

Bobbin and radiation shield assembly

Insulated bobbin & radiation shield being inserted to vacuum chamber

Temperature distribution in cryostat

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

Field Mapping Jig

HMI for Cryo-panels system

Lower RF cavity in position

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.

SUPERCONDUCTING CYCLOTRON

SUPERCONDUCTING MAGNET WITH MAGNETIC CHANNEL AND MAIN BEAM PROBE

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

Medical Cyclotron (MC)

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

ADS Cyclotron (ADS-C)

ADS

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

R & D on Injector Cyclotron

Superconducting RF (SCRF)

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.

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)

Thank you!