An ion beam profile monitor, which consists of a two−dimensional array of sample points placed in the beam, is described. The monitor provides an accurate and unambiguous display of the beam profile on a laboratory oscilloscope. Performance of the monitor under various ion beam conditions is presented.
I s w d by Sandi-a Lakm.tari.QS, q w d % d far the United Srzrw~s Energy Resgtlrctr %i Devillrrpmenz AdrninistrMion by Sandia Corporation. This report war prepand & m account af work spansored by the Unit& SBws Offvetflmeiit. Neithec the Ldnibd S t m nor tha United S&& Energy Rgsearch & bev&pmwt Administration, nor eny of tHeir rrtrplopr, nor my of their contractors, sulmntractoro, CaP thbir mpltzyees, makr any warraney, e-x p d rn fmpiied, ar assumes any legal liability 07 reswnsibili~y h r the aacurw, campletems6 sr usefulness sf any Inhfiiatton, dpparatus, product crr pees discload, or represents that its use Wosadld not infrin6Fg privstdy owned rights. l W b t f i ? a i n We United Skates of m e r i c a &vail&ls E r a National .Technfcal E@asmatian Semice d. S. Deparbent df Cixmerre 5285 port ~o y d Road Sprfngfield, VA 22191 Price:
PBFA I1 is a 100 ?w pulsed power accelerator constructed at Sandia National Saboratories for use in the Light Ion Fusion Program. upon an inertial confinement fusion (ICF) target a lithium beam with sufficient energy, power, and power density to perform ignition scaling experiments. PBFA I1 include: generators, ( 2 ) pulse forming in water-insulated, water-dielectric lines with self-closing water switches, ( 3 ) module synchronization using laser-triggered, 6 Mv multistage gas switches, ( 4 ) voltage addition in vacuum using self-mgnetically-insulated biconic transmission lines, ( 5 ) inductive energy storage and pulse compression using a fast-opening plasm erosion switch, ( 6 ) beam formation using a magnetically-insulated ion diode, and ( 7 ) space-charge and current-neutralized beam propagation to the target in a gas-filled cell. The first multimodule shot was on December 11, 1985.
A series of bis(sulfonyl)-1-methylhydrazines were analyzed by positive ion electron impact (EI), chemical ionization (CI) and fast atom bombardment (FAB) mass spectrometry. Since these compounds showed activity against the L1210 leukemia, an understanding of their mass spectral behavior is important should the structural characterization of metabolites be required. FAB proved to be the most useful technique, generally providing abundant protonated molecule ion peaks, in contrast to the weak peaks observed with CI (ammonia or isobutane) and the total absence of molecular ion peaks in the EI mass spectra. In addition, utilizing FAB eliminated the problem of thermal decomposition, which was very difficult to control under EI and CI experimental conditions. Fragments observed in FAB and CI mass spectra were consistent with protonation at the methyl-bearing nitrogen. One can locate the R1 and R2 moieties relative to the methyl-bearing nitrogen in FAB and CI by assigning that nitrogen as the site of protonation, with subsequent elimination of R2SO2H.
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