We predict a hysteretic three-photon cyclotron resonance in narrow-gap semiconductors driven by two laser beams with their frequency difference near the cyclotron frequency. This effect is based on the Doppler and Lorentz nonlinear mechanisms and the nonparabolicity of the conduction band. A CO(2) laser intensity of 10(5)-10(6) W/cm(2) at 10.6 and 9.4 microm is required for observation of the e...

Ion cyclotron waves at approximately 0.7 the ion gyrofrequency have been observed experimentally in the large volume helicon reactor WOMBAT. These waves are highly localized along the axis of the device where a 8 cm diameter, 2 m long. Ar II plasma column is produced. Spectral measurements reveal a four-wave interaction where energy is down-converted to the ion cyclotron mode from the helicon p...

1Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA 2Department of Chemistry, University of California – Berkeley, Berkeley, CA 94720, USA 3Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA 4National Security Directorate, Pacific Northwest National Laboratory, 902 Battelle Blvd., Rich...

Contact Information a Galen Barbose, MS 90-4000, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley CA 94720, U.S.A., Tel: 1-510-495-2593, email: [email protected] b Charles Goldman (primary contact), MS 90-4000, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley CA 94720, U.S.A., Tel: 1-510-486-4637, email: [email protected] c Bernie Neenan, Neenan Associates, A U...

The electron cyclotron maser (ECM) is based on a stimulated cyclotron emission process involving energetic electrons in gyrational motion. It constitutes a cornerstone of relativistic electronics, a discipline that has emerged from our understanding and utilization of relativistic effects for the generation of coherent radiation from free electrons. Over a span of four decades, the ECM has unde...

At IBA a compact 14 MeV H+ cyclotron has been constructed. A special feature of this cyclotron is that there is no electrical deflector installed, i.e. the beam is selfextracted. The goal is to obtain high beam currents with good extraction efficiency without the need of single turn extraction. This is achieved with two ingredients: i) a special shaping of the magnetic field, showing a very ste...

Ask class: what does this mean about the total speed? Constant, of course. Ask class: how does the speed along the magnetic field change? It doesn’t, because the acceleration is all perpendicular to magnetic field. Since the total speed is constant and the speed along the field is constant, this implies circular motion around the field, combined with (possibly) a uniform drift along the field. ...

The following chapter is an extension and complement of the chapter titled: 'CYCLOTRON CAVITIES', written by C. Pagani (University of Milano and INFN, Milano, I). It will deal with cavity concepts deviating from conventional cyclotron cavities (Dees) treated in the previous lecture, which are mostly based on a λ/4 or λ/2 coaxial resonator design. Cavities differing from that design usually can ...

1 Center for Image Processing and Integrated Computing (CIPIC), Department of Computer Science, University of California, Davis, One Shields Avenue, Davis, CA 95616–8562, USA 2 Applied Numerical Algorithms Group, National Energy Research and Scientific Computing Center (NERSC), Ernest Orlando Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA 3 Visualization Grou...