SEM Supplies

P-47 Powder Scintillators

Research and development has resulted in production of P-47 coated scintillator on a glass disc for secondary electron detection. The use of P-47 (Y1Si2O7:Ce3) produces a scintillator which lasts longer, and the use of glass as a support material gives a signal output 2-4 times higher than that of plastic. The P-47 coated scintillator offers the following advantages:

  • Constant high quality
  • High signal output
  • Long durability
  • No vacuum contamination
  • No Al-coating
  • Bakeable up to 265°C
  • Indefinite shelf-life

YAG Single Crystal Scintillator Discs

YAG (Ytrium Aluminum Garnet) single crystal scintillators are chosen by many scanning electron microscopists because they have a very fast response time of 50-60ns and they do not degrade when bombarded by electrons or ions unlike plastic or most phosphor scintillators. They are therefore particularly suited for high current operations. Light emission peaks at about 560nm which means that S20 photo cathodes are most suitable for detecting the emission. The response is better than for the P-47 powder scintillator disc below 5kV and again at higher accelerating voltages, where the performance of powder scintillators falls off while the response of the YAG continues to increase linearly.

The crystal should be coated with 50nm of aluminum before use. If the layer becomes damaged it can be removed with sodium hydroxide without damage to the crystal. The crystals are mounted with the mat surface in contact with the light-pipe as this has been shown to increase efficiency. Uncoated YAG scintillators may be baked at temperatures up to 1000°C.

YAP Single Crystal Scintillators

YAP Single Crystal Scintillators

YAP (Ytrium Aluminum Perouskite) is more efficient in terms of light output than YAG, while sharing the same insensitivity to radiation damage and efficiency at fast scan rates. In addition, the emission spectrum peaks at about 378nm, which corresponds closely to the maximum sensitivity of the S11 photo multiplier used in most scanning electron microscopes. Also, the decay time of YAP is faster than YAG (40ns rather than 80ns), producing substantially superior overall performance. All YAP scintillators are polished on one side and mat ground on the other side. YAP crystals should be coated with 50nm of aluminum before use.

Instrument Size P-47 Powder YAG YAP
AMRAY     20.0mm C50000 C50005 C50010
AMRAY 1200 10.0mm C50020 C50025 C50030
ARL 19.9x7.3mm C50035 - -
Balscan 18.0mm C50040 C50045 C50050
Cambridge (except S-600) 10.0mm C50055 C50060 C50065
Cambridge S-600 12.0mm C50070 C50075 C50080
Cameca 12.4x3.2mm C50085 - -
Camscan 18.0mm C50090 C50095 C50100
ETEC 9.0x3.0mm C50105 C50110 C50115
ISI 13.7mm C50120 C50125 C50130
ISI Mini-SEM 7.7mm C50135 C50140 C50145
Hitachi 19.8mm* C50150 C50155 C50160
Nanolab 16.4x0.17mm C50195 C50200 C50205 $1,329.40
Zeiss 16.4x0.17mm C50210 C50215 C50220

*With metal ring Thicknesses are 1.0mm unless otherwise indicated. For other JEOL Instrumentation scintillators, see section T.

All prices are in Canadian Dollars. To request a price quotation or for other inquiries, please contact us.

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