Yuri Kamyshkov/ University of Yuri Kamyshkov/ University of TennesseeTennessee

email: kamyshkov@utk.edu email: kamyshkov@utk.edu

Mini-Workshop, WU St. Louis, Mini-Workshop, WU St. Louis, February 11, 2011February 11, 2011

Neutron source: 3.4 MW annular coreresearch TRIGA reactor with Liquid D2 cold neutron moderator

TRIGA =TrainingResearchIsotopesfrom General Atomics

Neutron ellipticalfocusing reflector

Reactor schematic of B. Whittemore, GA

Simulation Model of B. Wehring, NCSU NE

3.4 MW annular core TRIGAMCNP simulations with LD2cold moderator (r=13 cm)(B. Wehring, Nov. 2007)

Other TRIGA features:• least expensive fuel option;• simplest cooling option• fuel reload every 1-3 years• TRIGA is known as a safetiest research reactor

Dry tubeirradiation&NAA

Ge

Prompt activation analysis

Delayed n activation analysis pneumatic rabbit

neutron fluxes in NAA irradiation volumes are:thermal: 1E+12 to 1E+13 n/cm2/sfast: ~ 1E+11 n/cm2/s

cold

n

NNbar

FYI: Research reactors are different from the power reactors; the latter can not be used for NNbar search

Research reactors in India

Will India be interested to purchase/build a TRIGA or similar reactor?

Diagram of cyclotron operation from Lawrence's 1934 patent

+ SINQ – spallation neutron source

• Development of a new, compact, cheap, superconducting, high-current proton accelerator will be required;• Goal is to provide a source of neutrinos;• For pion production proton kin energy > 650 MeV will be desirable (<1.5 GeV);• Number of neutrinos power of machine (~ 1 MW or more will be desirable)

Power [MW] =

Current [mA] Energy[GeV]´

• Optimal energy for neutron production (yield per unit energy) is 1.3 GeV• DAEDALUS Collaboration is inspiring and coordinating a new accelerator development involving LBNL, BATES lab at MIT, and international collaborators (Italy)• UT group joint DAEDALUS recently.

Basic accelerator parameters needed by DAEBasic accelerator parameters needed by DAEDALUSDALUS

From Wikipedia:

Nobel laureate Carlo Rubbia at CERN has worked on developing the use of thorium as a cheap, clean and safe alternative to uranium in reactors. Rubbia states that a tonne of thorium can produce as much energy as 200 tonnes of uranium, or 3,500,000 tonnes of coal. One of the early pioneers of the technology was U.S. physicist Alvin Weinberg at Oak Ridge National Laboratory in Tennessee, who helped develop a working nuclear plant using liquid fuel in the 1960s.

• There are more Th than U in the Earth crust• 25% of world resources of thorium are in India (but no U)• known interest of India to the development of Th accelerator technology

Collaboration between FNAL and India exist for the development of Project X(http://projectx.fnal.gov) India might contribute ~$250M to Project XIndian contact for Project X at FNAL is Shekar Mishra

Google: high-current superconducting cyclotron India

Can be annular core research reactor be built in India for NANO?

Can TRIGA annular core be purchased by India from GA in USA?

Can we get ADS people in India to collaborate with us on NANO? First accelerator prototype of ~0.2 MW power (~1% power needed for ADS) might be already good for NANO

Spallation target development might be also of interest for ADS people