The operational lifetime of a radio-frequency ~rf! ion source is generally governed by the length of time the insulating structure protecting the antenna survives during exposure to the plasma. Coating the antenna with a thin layer of insulating material is a common means of extending the life of such antennas. When low-power/low-duty factor rf excitation is employed, antenna lifetimes of sever...

A novel tissue-equivalent proportional counter (TEPC) based on a gas electron multiplier (GEM) for measuring H*(10) for neutrons was designed and constructed. The pulse height spectra (PHS) of two different neutron sources (a 252Cf source and a AmBe source) were measured using the new TEPC. The measurements were made with the TEPC filled with two different gases (10P gas and a propane-based tis...

An extensive programme was successfully carried out during the 1995 to 1998 NMS programme to recalibrate and model by Monte Carlo simulations the characteristics of two NPL long counters that are routinely used to standardise neutron fluences [Ta98,Ta00] for neutron energies above 500 keV. The present work is a continuation of it in that the counters responses and effective centres have been me...

Boron neutron capture therapy (BNCT) is a promising cancer treatment modality that combines targeted boron agents and irradiation to selectively destroy tumor cells. In mainland China, the clinical implementation of BNCT has made certain progress, primarily driven by development compact source devices. The availability, ease operation, cost-effectiveness offered these sources make more accessib...

The electric dipole moment of the neutron, leptons, and atoms provide a unique window to Physics Beyond the Standard Model. We are currently developing a new neutron EDM experiment (the nEDM Experiment) [4]. This experiment, which will be run at the 8.9 Å Neutron Line at the Fundamental Neutron Physics Beamline (FNPB) at the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory, ...

~ The high temperature peaks (TL peaks 6-7) of TLD-600 are known to have higher responses to high LET radiation than to low LET radiation. These high temperature peak characteristics were studied for the automatic readerannealed Harshaw albedo neutron TLD. The high temperature peaks response is linear for neutrons over the dose equivalent range tested (0.05-3 mSv of a 252Cf source moderated by ...