Micro channel plate

Photomultiplier, or Electron multiplier, or Micro-channel plate... 

Peng XF, Peterson GP, Wang BX (1996) Flow boiling in binary mixtures in micro-channels plates. Int J Heat Mass Transfer 39 1257-1263... 

The liquid enters the micro channel device via a large bore that is connected to a micro channel plate via a slit (Figure 5.2). The slit acts as a flow restrictor and serves for equipartition of the many parallel streams [1, 3, 4]. The liquid streams are re-collected via another slit at the end of the micro structured plate and leave the device by a bore. The gas enters a large gas chamber, positioned above the micro channel section, via a bore and a diffuser and leaves via the same type of conduit. 

Fig. 11.13. Diagram of a TOF mass analyzer (with reflectron). Ions enter from an external source and are accelerated (orthogonally) by the pusher electrode toward the reflectron. The reflectron (ion mirror) retards, reverses and reaccelerates the ions back toward the micro-channel plate detector.

Besides space charge, image quality is limited by the combination of the number of pixels of the CCD camera and the size of a single ion event. The PSD usually employs two micro-channel plates (MCPs) mounted in a chevron configuration and backed by a phosphor screen. A product ion causes an electron cascade through the channel plates and onto the phosphor, which emits a pulse of diffuse light that must be focused properly onto the CCD array with a camera lens or fiber optic taper. In this process one product ion results in a signal on the CCD that is usually several pixels... 

Another approach to differentiating between the anode and cathode water contents is to perform through-plane visualization. Until recently, neutron radiography was not able to achieve the resolutions necessary to sufficiently resolve a membrane thickness of 25 pm and GDL thicknesses of 200 pm. However, Hussey et al.38 developed a new detector technology based on micro-channel plates that allowed in-plane visualization with a resolution of 30 pm (10 pm is feasible with further detector development). An exposure time of 20 min was used and the possibility of increasing temporal... 

TCSPC is Ulnstrated in Fig. 3a. In addition to a mode-locked laser for pnlsed excitation and a detector with high time resolntion (nsnally a micro-channel plate photomultiplier tube capable of time-resolution of 20-30 ps), the required instrumentation inclndes constant-fraction discriminators to generate electrical pnlses triggered by fluorescence photons and by the reference (the excitation pulse), a time-to-amphtude converter or other device to measnre the time lag between reference and flnorescence connts, and a multichannel scaler to accumnlate... 

Next, six ports are drilled in appropriate positions on the micro-channel plate. The surface of the micro-channel plate and the PMMA Ud are then activated by an oxygen plasma activation bonding system (EVG810LT from EV Group Co.) (Fig. 5.10b). Finally, the two PMMA stractures are directly bonded. The typical bonding conditions are -temperature of 85°C, pressure of 3 MPa, and annealing time of 3 min (Fig. 5.10c). 

One fundamental question which arises in these peeling experiments is from which surface are the particles being emitted Two experiments we have performed helped to answer this question. The first employed a charged particle imaging device called a micro-channel plate or Channel Electron Multiplier Array (CEMA), which produces on a phosphor screen an intensity pattern of the charged particles incident upon the plate. The patterns observed from peeling 3M Magic Tape from a solid surface depended on the orientation of the peel test and substrate relative to the CEMA. 

The primary electron gun, electron optical devices, deflection plates and the micro channel plate Auger electron detector are movmted coaxially with the cylinders of the analyzer. The focal point of the analyzer is coincident with the focal point of the primary electron beam. Scanning Auger microscopy (SAM) is... 

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