scrf cavity related r&d in rrcat, indore, india

S C Joshi at KEK Dec 17, 2007

SCRF Cavity Related R&D in RRCAT, Indore, India

Satish Chandra Joshi

Raja Ramanna Centre for Advanced Technology, Indore,

INDIA

Warm Greetings from RRCAT


(Other Team members (partial list): S B Roy, PK Kush , J Dwivedi, P Shrivastava, S

Krishnagopal , TA Puntambekar, P Khare, AM Puntambekar…) RRCAT, Indore and other

Collaborative Institutes.

Major Accelerator Centres of India

IUAC

BhubaneshwarIOP


Major Accelerator Centres in India• Raja Ramanna Centre for Advanced Technology,

Indore (Indus-1 & Indus-2 SRS, 10 MeV Industrial Linac, DC Accelerator etc.)

• Variable Energy Cyclotron Centre, Kolkata (224 cm Variable Energy Cyclotron, K-500 SC Cyclotron Accelerator, RIB facility

etc.)

• Bhabha Atomic Research Centre , Mumbai (7 MV FOTIA, 10 MeV e- Linac for Radiation Processing etc.)

• Inter University Accelerator Centre, N Delhi (15 MV Palletron & SC Linac Modules for energy augmentation etc.)

• Tata Institute of Fundamental Research, Mumbai (14 MV Palletron, SC 150 MHz QWR based Linac Booster for energy gain)

• Institute of Physics, Bhubaneshwar (3 MV Tandem Palletron Accelerator mostly for Materials Science)


Accelerator Programs in RRCAT

Operation of Synchrotron Radiation Source Indus-1 Indus-1 Utilization 2.5 GeV Synchrotron Radiation Source Indus-2

(beam storage experiments are now in progress) Medical & Industrial Accelerator Development 100 MeV Proton LINAC Development (Proposed) Prototype subsystem development for 1 GeV Rapid

Cycling Proton Synchrotron for SNS (Proposed) RRCAT-CERN Collaboration Assistance to University Centers for Accelerator

Mangalore University Microtron

Centre for Advanced Technology, Indore


TL-3

TL-1

TL-2

Indus-2, 2.5 GeV SR(Trials to store the beam began)

December 2005

Indus-1 (450 MeV, 100 mA)

(Working since 1999)

Booster Synchrotron (700 MeV)

(Started in 1995)

Microtron (20 MeV)

(Started in 1992)

SCHEMATIC VIEW OF INDUS COMPLEX

Hallmark of Our SRS Program is• Intense focus on indigenous development &

qualifying sub systems through home efforts.• These include the magnets & their power

supplies, vacuum chambers, ion pumps & gauges, beam diagnostic accessories, RF driver and control systems etc.

• Vendor development for many high quality components for these accelerators.

Status:Indus-2, TL-3 Fully Integrated;~70 mA accumulated.Injection @550MeV, beam energy ramped up to 2.4 GeV.


700 MeV Booster Synchrotron

Indus-1 Hall, Beam-lines, TL-2 & TL-3(Indus-1 is a 450 MeV 100 mA Storage Ring)

TowardsIndus-2

TL-3

TL-2

Indus-1 Beam-lines : Monochromators used & wave lengths covered (in A)

1. Reflectivity – TGM (40 – 100A) 2. Photo physics – SN (500 – 2000A)3. Angle resolved PES – TGM (40 – 1000A) 4. High resolution VUV Bl – RC (700 – 2000A) 5. Angle integrated PES – TGM (60 – 1600A) 6. Photoabsorption (PASS) – PGM (17 – 225A) $

$ Under construction


Assembly of Indus-2 Ring in the Tunnel RF Cavities installed in Indus-2 Ring

Long Straight Section LS-6 Assembly

Transport Line-3 Joining on to Indus-2


Range (KeV) Groups

Being built

XRD powder diffraction (Installed) 5 – 25 RRAT

XRF-microprobe 2 – 20 RRCAT

Energy Dispersive – XRD (#) 10 – 70 BARC

EXAFS (Installed)

5 – 20 BARC

Grazing incidence mag scattering (#)

5 – 15 SINP, Kolkatta

PES (With high resolution at ~6keV) (#)

.8 - 15 BARC

Small angle X-ray scattering (SAXS) 8 - 16 BARC + IGCAR

Being designed

Protein Crystallography 6 – 25 BARC + UGC-DAE-CSR

White-beam lithography 1 – 10 RRCAT

MCD/PES on bending magnet 0.03 – 4 UGC-DAE-CSR

Medical imaging beam-line 10 – 35 BARC + UGC-DAE-CSR

Planned

IR-beam-line 2 – 100 m BARC

Undulator-MCD 0.1 – 1.5 RRCAT

X-ray beam diagnostics 6.2 RRCAT

Visible beam diagnostics Visible RRCAT

Beam-lines being built/designed/planned

(# Action towards beam line installation in experimental hall has started )


Prototype Front-end of Indus-2 Beam-line Built

First front end on XRD First front end on XRD BL Indus-2 installedBL Indus-2 installed

Major Events in 2006 (III)

Experimental operation @ 2 GeV


First x-ray diffraction record with SR from Indus-2 using XRD BL12 on Sept 28, 2006; Indus-2 beam energy was 2 GeV & current ~4 mA. DCM was aligned to get monochromatic SR out but calibration was still on. Collecting and focusing mirrors were not yet in place.

Major Events in 2006 (IV)-XRD BL Progresses


Major Events in 2006 (VI)- EXAFS BL Installed


Main parameters

Energy range : 0.85 keV to 15 keV,

Resolution : ~ 10-4

Overall Pressure : < 5x10-10 mbar

Crystals : (1) Si (111), 2d = 6.271 Å ,

(2) Beryl (1010), 2d = 15.954 Å

Spot on Sample :~ 250 m x 250 m

Salient Features:• Home built DCM, slit assemblies & HSA for electron-energy analysis.• All subsystems computer controlled.• Sample temperature 10 - 1100 K.• Insitu thin film preparation facility.• Pre-characterization by LEED/ AUGER • Arrangement for depth profiling. • Software developed for data acquisition and analysis.

Major Events in 2007 (I)- Work on PES BL Started


International Collaborative Program on ILC/X-FELat

Raja Ramanna Centre for Advanced Technology, Indore, India

The ILC R&D activities at RRCAT form part of bigger program of Indian DAE Institutes. It encompasses

1. Indian participation in accelerator design for ILC.

2. Superconducting Materials R & D for SRF Acceleration related research.

3. Superconducting Radio Frequency (SCRF) Acceleration Science and Technology, including setting up test facilities that would be useful for High Current Proton Driver.

4. General Accelerator Science and Technologies, including conventional and Free Electron Lasers.

Partner institutes: (Indian DAE): RRCAT, BARC, VECC, TIFR; (Others) IUAC & DU.(Overseas) FNAL, SLAC, USA & KEK, Japan


Areas of Collaboration:

Superconducting RF Cavities and Cryomodules for ILC/X-FEL.

High Intensity Proton Accelerator & other facilities using similar SRF Technology.

All Solid State Long Pulse Modulator Technology.

1.3 GHZ RF Test Stand with Waveguide Distribution.

Background:

Indian Institutes and FNAL have been collaborating on High Energy Physics Fixed Target Experiments (E706 and D0) since 1985.

India has contributed to LHC & CMS, ALICE detectors at CERN. India has “Observer State” status at CERN.

India is contributing to CLIC Test Facility3 & Linac4 at CERN.


New Programs Related to ILC / SCRF Cavity Development at RRCAT

1. Development of SCRF Cavity & Associated Technology & their Applications.

2. Participation in International Collaboration


• Design SC-RF cavity structures + beam physics.• Fabricate SC-RF cavity structures & also try new

designs.• Establish facility for Chemical and thermal treatments of

SC-RF cavities .• Evaluate and characterize superconducting materials.• Establish Cavity testing & characterization facility • Study Surface science of superconductors; New

materials for SCRF Cavities. • Pursue R&D in cryogenics & RF aspects.

R&D Methodology for Development of SCRF Cavity


R&D Activity on SCRF Cavity Structure (Kick-off)

Development of 1.3 GHz TESLA Type single cell cavity• Structure design• Die & punch Design for cavity half cell • Tooling Development for cavity half cell machining• RF Frequency measurement • Welding setup for Single Cell Cavity • Frequency tunning setup for single cell


Simulation of Single Cell SCRF Cavity

Electric field along the axis Magnetic field along the axis Cool down from 300 -2K

Electric field along the axis Magnetic field along the axis


Forming Simulation of Half Cell


Forming Tryouts of 1.3 GHz Half Cell in Cu

Forming Die & Punch Forming of Half Cell in 3 mm Cu Sheet


New Additional Facilities Planned to be Set Up at RRCAT

Put up SCRF cavity fabrication infrastructure (like, Hydraulic Press, Facility to make parts of Nb cavities, EBW Machine etc.), plus chemical processing facilities ( eg, EP/BCP/BP, HPR & Annealing Furnaces etc.), assembly & testing set up. (Clean-room, Test cryostats, RF sources etc.)

Add to cryogenic infrastructure, (Bigger Liquid He Plant, Liquid N2 Plant and Accessories for Larger Cryogen & Gas Handling Systems etc.)

Augment experimental facilities for superconducting materials research. Add to presently available (magnetic, electrical & thermal conductivity measurements) new set ups (UTM, Eddy Current Scanner, SIMS, SEM & Auger Spectroscope etc.)

Build an infrared source to give coherent radiation at wavelengths down to ~30 microns, using a superconducting post-accelerator.


Proposed Clean Room Facility

Class-10 75 sq m

Class-100 125 sq m

Class-1000 80 sq m

Class-10,000

250 sq m

Plan for SCRF Cavity Processing / Clean Room Facility


Proposed EBW Facility

Major Specifications• Electron Gun– 15 kW – 70 kV, • Welding chamber 3000 mm (L) x 1000 mm (W) x 1200

mm (H) with two Cryogenic pumps and run out platform.• Y axis, by the Electron Gun, 200 mm travel, CNC

controlled.• X axis, by the worktable, 1300 mm travel, CNC

controlled.• CNC Rotary Manipulator with tail stock• Tilting system, 0° to 90°• General Control System with CNC


Engineering Facilities at RRCAT4 axis - Turn Mill CentreUP-65 Spinner, GermanyWorking Range: 210 x 640 mm,8-Live tools, C-AxisPositional accuracies < 1 micron, Run-out < 1 micronCNC- Siemens 840D with AUTO turn

3-Axes coordinate measuring machine Measuring capacity-600 x 500 x400 mm, Measuring Accuracies: Linear-1.5+ L/300 micron.,

Vol.-2+L/250 micron. CNC Controller, Free form Digitizing.

Hydraulic Press Hydraulic press capacity: 100 T Main table size of press: 1000mm x 800mm. Working height is 710mm. Die cushion tonnage:30 tons, stroke: 150 mm


Liquid Helium Plant

Liquid Nitrogen Plant

Liquid Helium Plant : Make M/s Linde Model : TCF 20Installed capacity : 40 Lit/ hrAnnual production : 70,000 liters

(on user requirement)

Cryogenics Facility at RRCAT

Liquid Nitrogen:A) Liquid Nitrogen Plant: Make M/s Linde Model : Linit 50 Installed capacity: 40 Lit/ hrB) Liquid Nitrogen Plant : Make M/s Philips Installed capacity : 20 Lit/ hr

Annual Consumption touches 60,000 liters


4.2 K Cryogenic Test Station

To meet the requirement Testing facility was developed with magnet testing Capacity of 100 Magnets/ month

Power Converter3V-1200 Amp

For LHC 2000 magnets tested at 4.2 K in a duration of about 3 years


Sextupole Corrector

Magnet (MCS): 1142 Nos

Decapole- Octupole Corrector

Magnet (MCDO): 636 Nos


Future Plans for Enhancement of Cryogenics Facility at RRCAT

• Approx. 200 lit/hr Liq Helium Production/ with Approx. 5,000 – 10,000 Lit storage

• Development of 2K Cryostats• Development of SCRF cavities testing faculty

• Approx. 400 lit/hr Liq Nitrogen Production


Ongoing R&D on SC Materials Useful for Accelerators:

1. RRCAT Team is studying differently processed Technical- Nb materials. Idea is to find out what all enhances or degrades SC properties, to help build cavities with highest gradient.

2. Later try new materials : MgB2 , Nb3Sn, V3Si , MoRe-alloys etc.

Questions being asked:

Is there any definite dependence of Hcritical on,

•the methods of sample preparation, grain size ?•the surface treatment– EP versus BCP ? •the annealing temperature and time ?

Experimental tools used:

Magnetometry : SQUID magnetometer and VSM.

Surface studies : SEM.

Thermal properties– thermal conductivity & Sp. Heat.

RF surface resistance measurement: Future plan.


Experimental Facilities at RRCAT for Superconducting Materials

• 16 Tesla Cryo-magnet with variable temperature insert (Oxford Instruments, UK) for physical properties measurements.

• Thermal properties (specific heat, thermal conductivity, thermoelectric power) measurements system (PPMS, Quantum Design, USA) in the temperature range 2-300 K and in the presence of magnetic fields up to 9 Tesla.

• Home made ac-susceptibility measurement system in temperature range down to 77K. This facility is now extended to 4.2K using a new helium cryostat.

• Temperature dependent electrical conductivity measurements down to 77K using liquid nitrogen cryostat and down to 35K using a locally made closed cycle refrigerator.

• Home made Differential Scanning Calorimeter (DSC) working down to 77K.

• Argon arc furnace for synthesis of metallic alloys and intermetallic compounds

scrf cavity related r&d in rrcat, indore, india

Documents

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constructions c joshi

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