Proposed iMera Special Facility
PTB Primary Temperature Radiators PriTeRa
PTB operates a series of blackbody radiators in the temperature range from -173 °C up to 3000 °C as standard sources
• for temperature radiation from -173 °C up to 3000 °C traceable either to the ITS-90 or to thermodynamic temperatures
• for spectral irradiance from 200 nm up to 2500 nm and spectral radiance from 220 nm up to 15 µm
• for the investigation and characterisation of metal(carbide) carbon eutectics
Low and Medium Temperature Facility covering the temperature range from -60 °C up to 962 °C.
r
Low Background Facility covering the temperature range from -173 °C up to 200 °C under vacuum.
Vacuum detector chamber
LN2 cooled beam line Ga blackbody
Opto-mechanical unit
LN2 blackbody as radiometric zero
Source chamber
Source under calibration
IR reference blackbody (-173 °C up to 200 °C)
In blackbody
Vacuum IR standard radiation thermometer VIRST
Detetor under test
device to be calibrated in terms of T90
600 mm
SPRT SPRT SPRT SPRT
ammonia heatpipe bb -60 °C to +50 °C
ε = 0.9999
water heatpipe bb 50 °C to 270 °C
ε = 0.9998
caesium heatpipe bb 250 °C to 650 °C
ε = 0.9996
sodium heatpipe bb 500 °C to 960 °C
ε = 0.9996
x
y
3000 mm
High-temperature Facility covering the temperature range from 1000 °C up to 3000 °C
Spectral Irradiance Facility. (left) and High-temperature Blackbodies (right). The new high-temperature blackbody BB3500MP (inset) can be operated up to 3200 °C.
Technical details of the PriTeRa facilityblackbody temperature
range / °Ccavity material
cavity length / mm
cavity diameter / mm
emissivity of the cavity walls
cavity emissivity (uncertainty k=1)
LN2-bb -173 - 170 Copper 250 40 0,96 0,9997 ± 0,0001NH3-bb -60 - 50 Steel 525 60 0,965 0,999 90 ± 0.000 06H2O-bb 50 - 270 Titan 420 60 0,88 0,999 80 ± 0.000 15Cs-bb 270 - 650 Inconel 600 368 41 0,75 0,999 60 ± 0.000 17Na-bb 500 - 962 Inconel 600 368 41 0,75 0,999 60 ± 0.000 17Graphite-bb BB3200pg
1000 - 3000 Graphite 200 37 0,86 0,999 ± 0,001
Graphite-bbBB3500MP
1000 - 3200 Graphite 250 59 0,86 >0,999
Contact:Jürgen Hartmann PTB Abbestr. 2-12 D-10587 Berlin Germanyphone: +49 30 3481 7451 fax: +49 30 3481 7510 email: [email protected]
HTBBAu BB
800
3000
1800
grating doublemonochromator0.25 m, additive220 nm to 2,5 µm (15 µm)
filter radiometer absolute radiometry
TV cameramodulator/filter assembly
detectorstage
objectivemirror f = 600 mmf-number 1:4.3
lam
p 1
He
Ne
lam
p 2
lam
p 3
lam
p 4
lam
p 5
lam
p 6
spe
ctra
lla
mp
PMT
PMT
Si InAs
InSb
MC
T
HeN
e
LP3
1500
