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LS-4111 数据表(PDF) 5 Page - PerkinElmer Optoelectronics |
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LS-4111 数据表(HTML) 5 Page - PerkinElmer Optoelectronics |
5 / 6 page Definition of Terms TERMS USED TO CHARACTERIZE INDIVIDUAL PULSES Peak Anode Voltage (epy): maximum positive anode voltage, with respect to the cathode. Peak Inverse Anode Voltage (epx): maximum negative anode voltage, with respect to the cathode. Peak Forward Anode Current (ib): maximum instantaneous positive anode current. Peak Inverse Current (Ibx): maximum instantaneous negative anode current. Pulse Width (tp): current pulse full-width at half-maximum. Pulse Repetition Rate (prr): average number of pulses/second. Current Rise Time (tr): time for the forward current to rise from 10% to 90% of its peak value. Anode Fall Time: time for the forward anode voltage to collapse from 90% to 10% of its maximum value. Anode Delay Time (tad): time interval between triggering and commutation (commutation is defined below). The precise reference points for this interval vary with the application. Anode Delay Time Drift ( ∆tad): gradual decrease in anode delay time that occurs as the thyratron warms up. Jitter (tj): pulse-to-pulse variation in anode delay time. TIME AVERAGED QUANTITIES DC Average Current (Ib): forward current averaged over one second. RMS Average Current (Ip): root-mean-square current averaged over one second. Plate Breakdown Factor (Pb): numerical factor proportional to the power dissipated at the anode, averaged over one second. Pb = epy x ib x prr. STRUCTURAL PARTS OF THE THYRATRON Auxiliary Grid: grid placed between the control grid and cathode in some thyratrons. A small DC current (or a larger pulsed current) applied between Auxiliary Grid and cathode can be used to control the anode delay time. (Anode delay time is defined above). Thyratrons with auxiliary girds are called Tetrode Thyratrons. Reservoir: maintains the gas pressure in the tube at a level which depends on the reservoir heater voltage. GENERAL TERMINOLOGY Static (Self) Breakdown Voltage (SBV): applied voltage at which a thyratron will break down spontaneously, without being triggered. Commutation: transition from trigger breakdown to full closure of the thyratron. Recovery Time: time which must elapse after decay of the circuit current before anode voltage can be reapplied to the thyratron without causing self-breakdown. The maximum possible pulse repetition rate is the inverse of the recovery time. Grid Bias: negative DC voltage which may be applied to the control grid to speed up recovery. |
类似零件编号 - LS-4111 |
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