We have systematically established the excitation frequency, amplitude, duration, and buffer gas pressure for optimal axialization efficiency and mass selectivity of quadrupolar excitation-collisional cooling for isolation of parent ions for collision-induced dissociation in Fourier transform ion cyclotron resonance mass spectrometry. For example, at high quadrupolar excitation amplitude, ion a...

The INFN LNS Superconducting Cyclotron has been operating for almost 20 years. Several beams are currently accelerated and delivered, allowing for a wide variety of experimental activity to be carried out. In addition, clinical activity is regularly accomplished: over 11 years of proton-therapy of the eye pathologies, around 300 patients have been treated. This has stimulated a growing number o...

We investigate the Terahertz(THz)-response of a square antidot superlattice by means of photoconductivity measurements using a Fourier-transformspectrometer. We detect, spectrally resolved, the cyclotron resonance and the fundamental magnetoplasmon mode of the periodic superlattice. In the dissipative transport regime both resonances are observed in the photoresponse. In the adiabatic transport...

For safe and reliable operation of commercial radioisotope production medical cyclotrons the implementation of preventative maintenance at regular intervals becomes mandatory. During the long-term operation of a medical cyclotron, numerous (radio) activated zones at various locations of the cyclotron facility producing high levels of gamma radiation are created. These radioactive zones are caus...

We have improved the ability to compare the masses of single ions by an order of magnitude to a fractional accuracy of ∼ 7× 10−12. This is done by simultaneously confining two ions in a Penning trap, and simultaneously comparing their cyclotron frequencies which are inversely proportional to the masses. The precision of the previous technique of alternately trapping the two ions was completely ...

We review recent cyclotron resonance studies of semiconductors performed in high magnetic fields. This traditional semiconductor characterization method has been used to study some of the recentlydeveloped materials systems, including ferromagnetic III-V semiconductors and two-dimensional electron gases formed in InSb/InAlSb and GaN/AlGaN heterostructures. These studies have not only provided a...

Cyclotron technology is largely disseminated into the medical and radio-pharmaceutical community. In particular, cyclotron-based systems devoted to radioisotope production, both for therapy and diagnostics, are commercially available and used since many years. Today, almost 10 years after the construction of IBA’s first CYCLONE 30, a cyclotron that revolutionized cyclotron technology for medici...

The equilibration of spin temperature Tspin with kinetic temperature T is examined in a weakly correlated pure electron plasma in the strongly magnetized limit, where the distance of closest approach is large compared to the Larmor radius. In this limit, the spin precession frequency ,rZ,===g&./2 is large so the component of spin along the magnetic field is an adiabatic invariant that is broken...

We present a theory for the electronic and optical properties of nand p-type In1−xMnxAs in ultra-high magnetic fields. An eight-band effective mass model based on the Pidgeon–Brown model and including the wavevector dependence of the electronic states as well as the s–d and p–d exchange interactions with Mn d-electrons is used to determine the electronic states. The optical properties such as c...

Cyclotron modes of a non-neutral Mg ion plasma were studied in a long cylindrical PenningMalmberg trap. Several modes with angular dependence exp(iZ@, 12 1, are observed near the cyclotron frequencies of the various Mg ions. The I= 1 modes for the majority species are downshifted from the cyclotron frequencies, with downshifts as large as four times the diocotron frequency. These large shifts a...