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RARAF Accelerator Replacement • History of RARAF Van de Graaff • Removal of Van de Graaff • Placement and assembly of Singletron • Comparison of accelerators • Timeline for installation

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Page 1: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

• History of RARAF Van de Graaff

• Removal of Van de Graaff

• Placement and assembly of Singletron

• Comparison of accelerators

• Timeline for installation

Page 2: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Van de Graaff at Brookhaven National Laboratory 1949

Page 3: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Cosmotron Cosmotron injector

Page 4: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Van de Graaff at BNL before move to Nevis

Page 5: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementVan de Graaff stored at Nevis and being positioned

Page 6: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Nevis 200 MeV cyclotron partially disassembled and being entombed

Page 7: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Van de Graaff before removal

Page 8: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementRemoving charging belt (June 13)

Page 9: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Page 10: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementRemoval of acceleration tube

Page 11: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Terminal, acceleration tube and column removed

Page 12: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementBaseplate with column and drive motor removed

Page 13: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementMaking opening in rear wall

Page 14: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementVan de Graaff tank being removed from building

(August 2)

Page 15: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Page 16: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Page 17: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementRemoval of baseplate

Page 18: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Page 19: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementAccelerator tank leaving Nevis

Page 20: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Interior parts of the Van de Graaff being taken away by Robert Krawchuk

Page 21: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Arrival of Singletron at RARAF (August 10)

Page 22: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Page 23: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Installation of baseplate and resonant coil tank

Page 24: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

HV power supply & resonator coil

Singletron, baseplate & quadrupole

Page 25: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Interior of Singletron Terminal with shell removed

Page 26: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Parameter Van de Graaff Singletron

Terminal Voltage (MV) 0.8 - 4.2 0.2 - 5.0

Ripple (V) ~1200 200

Proton current (μA) >150 200 (100)

He current (μA) ? 125

Charging system Belt Induction

Note: Lower x-ray radiation in Singletron due to spiral acceleration tube design

Accelerator comparison

Page 27: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Principle of operation of a Pelletron or Van de Graaff

Page 28: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Singletron resonant coil interior Interior of tank with “Dees”

Page 29: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

Electrodes & diode stacks with spark gaps

Page 30: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator ReplacementRF ion source

Page 31: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

TASK From To

Mechanical installation (positioning, anchoring rails, etc.) 9/20 10/4

Wiring, water, ion source, function tests 10/5 10/7

Accelerator checks (open air) 10/10 10/14

INSTALLATION BREAK (1st 4 weeks over) 10/17 10/24

Tank filling and conditioning for voltage 10/25 11/2

HV test/ radiation check 11/3 11/4

Beam tests 11/7 11/11

Specification: voltage, stability, beam current 11/14 11/18

INSTALLATION BREAK (2nd 4 weeks over) 11/21 11/28

Return if necessary 11/29

Timeline for Singletron installation

Page 32: RARAF Accelerator Replacement History of RARAF Van de Graaff Removal of Van de Graaff Placement and assembly of Singletron Comparison of accelerators Timeline

RARAF Accelerator Replacement

RARAF Staff

Gerhard Randers-Pehrson

Alan Bigelow

Guy Garty

Greg Ross

Giusseppe Schettino

HVEE staff

Arnoud Terpstra

Robert Honee


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