参数资料
型号: C952
厂商: PerkinElmer Inc.
英文描述: CHANNEL PHOTO MULTIPLIER
中文描述: 通道光电倍增
文件页数: 2/11页
文件大小: 859K
代理商: C952
Description
P
erkinElmer Optoelectronics, for-
merly EG&G Optoelectronics, is
pleased to introduce the Channel
Photomultiplier (CPM), a new ultra
high sensitivity optical detector
whichreplacesconventionalphoto-
multipliers (PMTs) and avalanche
photo diodes (APDs). This device
usesauniquedetectorprinciple,re-
sultinginacompactdesignwithul-
tra high gain, high dynamic range,
extremelylowdarkcurrent,andfast
response.
T
hishigh-performancedetectoroffers
fundamentaladvantagesforanalytical
instrumentationapplicationssuchas
emissionspectroscopy,flourescence,
atomicabsorptionspectroscopy,and
bioandchemo luminescence.The
CPMalsodeliversimportantadvan-
tagesinlifescienceproducts,indus-
trialandmedicalequipment,andhigh-
energyphysics.
PrincipleofOperation
T
he CPM, like conventional photo-
multipliertubes,convertsaverylow
light level into photoelectrons by a
semitransparent photocathode de-
posited on the inner surface of the
entrancewindow.Ontheirwayfrom
thecathodetotheanodethephoto-
electronspassthroughanarrow,se-
miconductivechannel.Eachtimethe
electrons hit the inner wall of the
curvedchannel,multiplesecondary
electronsareemitted.Thiseffectoc-
curs multiple times along the path,
leadingtoanavalancheeffectwitha
gainexceeding10
8
.Thecurvedsha-
pe of the glass tube improves the
multiplicationeffect.
Features
Ultrahighanodesensitivity
upto10
7
A/W
Extremelylowdarkcurrent,
typically3pA@10
6
gain
Verylowequivalent
noiseinput(downto10
-17
W)
Veryhighstabilityindarkcurrent
(no”bursts”)
Highgainexceeding10
8
Veryhighdynamicrange
Compactdimensions
Widespectralresponsethrough
multiplewindowmaterials
Highresolution
Fastresponsetime
Highimmunitytomagneticfields
Ruggeddesign
Cathode Channel-Entrance
Channel-End Anode
Coax
-20…-50 V
black
1 Mohm
Proposal for Power Supply
-HV
100 V
-HV
red
-HV +50…+300 V
blue
Physical Specification
C H A N N E L P H O T O M U L T I P L I E R
C
P R I N C I P L E O F O P E R A T I O N
W
hen compared to conventional
PMTs, the CPM improves anode
sensitivity by one order of magni-
tude,whileloweringdarkcurrentby
onetotwoordersofmagnitude.The
noiselevelshowsextremestability
over time, with no ”bursts.” The
extremelylowdarkcurrentresultsin
a higher dynamic range than con-
ventionalPMTsandextendsdetec-
tablelimitsformanyapplications.
T
heCPMcanbeusedinanalog-DC
mode,singlephotoncountingmode,
and in nuclear spectroscopy (when
coupledtoscintillationmaterialslike
BGO, LSO, Nal, etc.). PerkinElmer
Optoelectronics offers a choice of
window materials and photocatho-
des to cover the spectrum from
115nm(UVrange)to900nm(NIR).
T
henewdetectorisasmall,head-on
typewithatotaldiameterof10.5mm
includingencapsulation.PerkinElmer
Optoelectronicsalso offerscustom
configurationsforspecificapplica-
tions.
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