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Scintillators

Scintillators

 

 

Planotech P-47 Scintillator Discs

Planotech scintillator discs are made of carefully selected P47 phosphor and coated very uniformly and recommended for routine use. They have a high signal output and good working life. They should not normally be coated with aluminum, unless cathodoluminescence studies are envisaged. An aluminum coating reduces the efficiency by some 20%. Discs are available for all principal types of microscope. Please refer to the ordering table below. Special sizes are available upon request.

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YAG Single Crystal Scintillator Discs

YAG (Yttrium Aluminum Garnet) single crystal scintillators are chosen by many scanning electron microscopists because they have a very fast response time of 50 - 60ns and (unlike plastic or most phosphor scintillators) they do not degrade when bombarded by electrons or ions. 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 Plano P47 discs 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 50 nm 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 matt surface in contact with the light pipe as this has been shown to increase the efficiency. Uncoated YAG scintillators may be baked at temperatures up to 1000° C.  Sizes are listed in the ordering table.

YAP Single Crystal Scintillator Discs

YAP (Yttrium Aluminum Provskite) crystals are more efficient in terms of light output than YAG crystals (see graphs). Also, the emission spectrum peaks at about 378nm, and this corresponds fairly closely with the maximum sensitivity of the S11 photo cathode which is in general use in most electron microscopes. In such microscopes there would, therefore, be a significant improvement in signal by using a YAP crystal rather than a YAG. The decay time is faster than YAG (40ns compared with 80ns ) so its overall performance is markedly superior to YAG, while it shares the advantage of insensitivity to radiation damage. It is available in the same formats, see listing in the ordering table .

Ordering Information For Scintillator Discs

                      Description                                                        Catalog #
Dia Instrument Plano P47 YAG YAP
6 mm

ICT semiconductor mod

7666 8300 8320
6.2 mm

Philips Quad Detector

 7657 8301 8321
7.7 mm

ISI/ABT/Topcon Mini SEM

 7650 8302 8322
8.8 mm x 2 mm

JEOL 25,733, T, 800 and  6000 series

 7662 7680 8323
9 mm x 3 mm

 ETEC

7661 8303 8324
10 mm

Cambridge/Leo except S600

7652 7681 8325
10 mm

AMRAY 1200 

7652 7681 8325
12 mm

Cambridge S600

7653 8304 8326
12 mm x 0.17mm

Zeiss SEM

 7665 8305 8327
12.4 mm x 3.2 mm

Cameca

7667 8306 8328
13.7 mm

ISI/ABT/Topcon, Jeol

7651 7682 8329
16.4 mm x 0.17 mm

Zeiss Novascan Semco/Zeiss

 7663 8307 8330
18 mm

Camscan/Balscan

7655 7683 8331
19 mm

Jeol U3 and JSM-2

7654 8308 8332
19 x 7.3 mm

ARL SEMQ

7658 8309 8333
19.8 mm

Hitachi with metal ring

 7656 8310 8334
20 mm

Jeol 50A,35 and 6000F series

7659 7684 8335
20 mm

Leitz/Amray,no1200

7659 7684 8335
20.0 mm x 2 mm

Philips/FEI

 7668 8311 8336

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Plastic Light Pipes with Add-On Scintillator Disc.

As an economical choice for Cambridge/Leo SEMs, we offer plastic light pipes with the excellent Planotech P47 scintillator discs. The replaceable 12mm diameter discs are not coated with aluminum. This is a very economical way of obtaining a high performance pick up system with an easily replaced scintillator disc.
 

Catalog #

Description

Qty

7669

Light pipe - angled - plus scintillator disc

Each
7670

Light pipe 74mm, 9.0mm diameter plus scintillator disc

Each
7671

Light pipe 89mm, 9.0mm diameter plus scintillator disc

Each
7672

Light pipe 104mm, 9.0mm diameter plus scintillator disc

Each
Please use the catalog number and description when ordering.

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Combined Light Pipe-Scintillator Disc.


Combined light pipe/scintillator disc assemblies are available for Cambridge/Leo SEMs employing light pipes with conical tip. Two standard lengths are offered, 99mm and 120mm, although others can be made to special order. The high efficiency long life Plano P47 scintillator disc is permanently bonded to the plastic light pipe. Each assembly is supplied complete with light pipe, scintillator disc and high voltage connector.

Catalog #

Description

Qty

8275 Conical tip light pipe, 99mm length Each
Please use the catalog number and description when ordering.



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Taylor Light Pipes
 

Efficient operation of the SEM demands regular replacement of the scintillator. Rather than purchasing replacement tips for light pipes, it is preferable to use a quartz light type and to coat its tip with scintillator material in suspension. This can be washed off and the light pipe recoated when necessary


The following quartz light types are available.
 

Catalog #

Description

Qty

7791-0

Cambridge angled for series 100 stage

Each
7791-1

Cambridge straight, 74mm long

Each
7791-2

Cambridge straight, 89mm long

Each
7791-3

 Cambridge straight, 104mm long

Each
7791-4

Jeol (various designs. If the pattern illustrated does not fit your instrument, please specify dimensions required).

Each
7791-5

Exchange replacement service. Return your used quartz light pipe in exchange for a recoated light pipe. (Note: this service is available only for Taylor quartz light pipes )

Each
Please use the catalog number and description when ordering.

Phosphor Powder

P47 phosphor powder highly recommended for scintillator  discs for those who wish to prepare their own. For normal applications the resulting disc should not be aluminum coated

Discontinued

Catalog #

Description

Qty

7790 P47 phosphor powder 25 g
Please use the catalog number and description when ordering.

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Online Catalogs

catalog

For your convenience we have also provided our latest supplemental catalogs in PDF format here.

Other catalogs may be found within the Products section.