Microchannel plate intensifier

Microseconds to nanoseconds As previously mentioned, gated intensified vidicons can provide temporal resolutions as low as 40 nsec. New intensifiers, e.g., microchannel plates, may extend this range to 1-5 nsec or less. However, by far, the most useful tool for ns to ps spectroscopy is the streak camera, i.e., an ultra-rapid temporal-to-spatial electronic image sweeper (16). Streak cameras convert an optical signal, e.g., a spectrum, into... 

Figure 13. Principles of operation of the microchannel plate (MCP) intensifier...

The sensitivity of both vidicons and diode arrays can be enhanced using a microchannel plate image intensifier. For example, Tracor Northern in their IDARSS system have used a Genii microchannel plate inverter intensifier, fiber-optically coupled to a Reticon diode array. With such a system, single photoelectron sensitivity, i.e. one count per photon, can be... 

Figure 1. The effect of near field stray radiation on the spectral line profile (546-nm Hg emission line). The detector was a microchannel-plate image intensified diode array (Reticon model RL-5I2SF, Princeton Instruments, Inc. model IRY-512). Key a, full line profile b, upper half (FWHM)ofline andc, lower portion of line, 0-10% relative emission...

An intensified photodiode array (IPDA) detector for onedimensional spatial imaging in the EUV is shown in Figure 2. This type of detector was originally described by Riegler and Moore (14) It consists of a microchannel plate whose output is optically coupled to a self scanning photodiode array. An incident photon produces a photoelectron which is subsequently amplified by the MCP. The exiting electrons are proximity... 

MicroChannel plate image intensified-coupled silicon... 

Figure C3.1.5. Schematic diagram of an intensifier-gated optical multichannel analyser (OMA) detector. The detector consists of a microchannel plate (MCP) image intensifier followed by a 1024-channel Reticon photodiode array. Light dispersed across the semitransparent photocathode ejects photoelectrons. These are accelerated toward the entrance of the microchannels by the gate pulse. The photoelectrons collide with the channel walls to produce secondary electrons, which are accelerated in turn by the MCP bias voltage to produce further collisions and electron multiplication. Electrons leaving the microchannels are further accelerated by the phosphor bias voltage.

Figure 3.1 schematically represents time-resolved experimental setup used in our experiments. The excitation sources were pulsed lasers, such as excimer XeCl (308 nm), nitrogen (337 run), three harmonics of Nd-YAG (266, 355 and 532 nm), and tunable dye and OPO, which deliver pulses of 10 ns duration. The spectra observed at the geometry of 90° are analyzed by intensified CCD matrix. Image intensifiers comprise three main components a photocathode, microchannel plate (MCP) and phosphor screen. The standard operation of these devices starts when the incident photons become converted into electrons at the photocathode. The electrons then accelerated towards the MCP where they are multiplied to an amount... 

Fig.6.38. Optical multichannel analyzer with microchannel-plate image intensifier...

The photon counting image detection system is the combination of a photocathode, a multiple stage microchannel plate image intensifier and a position sensitive resistive anode encoder (Fig. 10.48) [658, 2210]. 

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