A gun-cleaning "accident".
نویسنده
چکیده
A case is presented in which the question of suicide is raised. Several pointers are outlined to help in this differentiation.
منابع مشابه
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متن کاملPBPL Publications: 2009-00027 PUBLICATION ELECTRON EMISSION CHARACTERIZATION OF MG PHOTOCATHODE GROWN BY PULSED LASER DEPOSITION WITHIN AN S-BAND RF GUN
Pulsed laser deposition (PLD) has been proposed several years ago as a suitable technique to deposit a pure Mg film over a radio frequency (rf ) gun Cu backflange in order to obtain a high efficiency photocathode surface for the generation of high brightness electron beams. In this paper we report preliminary experimental results on the emission properties of a PLD grown Mg film within the high...
متن کاملAn-In-situ Photocathode Loading System for the SLC Polarized Electron Gun
An ultra-high vacuum loadlock system capable of operating at high voltage has been added to Lhe SLC Polarized Electron Gun. The unit incorporates facilities for heat cleaning, activating and measuring the quantum efficiency of photocathodes. A tray of up to four photocathodes can be exchanged without bringing the activation unit or gun up to atmosphere. Low voltage quantum efficiencies of 20% h...
متن کاملEmittance and Quantum Efficiency Measurements from a 1.6 cell S- Band Photocathode RF Gun with Mg Cathode
A comparison of electron beam parameters from a 1.6 cell S-band rf gun with Cu and Mg cathode at the SLAC Gun Test Facility are reported. The lower work function of Mg compared to Cu theoretically increases the quantum efficiency for a fixed laser wavelength and also increases the thermal emittance. Slice emittance measurements at low charge (15 pC) set an upper limit on the thermal emittance o...
متن کاملIn-situ Cleaning of Metal Cathodes Using a Hydrogen Ion Beam
Abstract Metal photocathodes are commonly used in high-field RF guns because they are robust, straightforward to implement and tolerate relatively poor vacuum compared to semi-conductor cathodes. However these cathodes have low quantum efficiency (QE) even at UV wavelengths, and still require some form of cleaning after installation in the gun. A commonly used process for improving the QE is la...
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عنوان ژورنال:
- Journal of insurance medicine
دوره 32 4 شماره
صفحات -
تاریخ انتشار 2000