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health physics
A Mirion Technologies Division
DIS-1 Direct Ion Storage Dosimeter
Passive Dosimetry
FEATURES
direct measurement of Hp(10) and Hp(0.07) over •
the entire energy range
instant readout•
extremely easy readout process•
passive operation•
not sensitive to EM and RF interference•
operation at high dose rates•
operation at pulsed elds•
PTB approved model available•
DIS-1
Direct Ion Storage Dosimeter
The RADOS DIS-1 personal dosimeter is
based on an ionisation chamber combined
with a modern electronic Direct Ion Storage
(DIS) memory cell. The Ion chamber is widely
used as a reference detector in radiation
detection and is now available in everyday
dosimetry applications.
The DIS-1 dosimeter could be described as a pas-
sive electronic TLD or Film badge, which can be
read instantly and non-destructively without any
loss of dose information. This unique feature al-
lows the user of the DIS-1 to read his/her accumu-
lated doses whenever necessery.
The DIS-1 dosimeter has a small, lightweigth, rug-
ged and watertight construction, which makes the
DIS-1 dosimeter reliable and easy to use.
The radiological range of the DIS-1 covers the
entire Hp (10) and Hp (0.07) photon and beta
energies without any compromises. The wide
dose and energy range, the ability to operate in
pulsed elds and the performance at high dose
rates make DIS-1 an ideal device for all kinds
of radiation dosimetry applications. The DIS-1
allows for the detection of heavy, high-energy
ions and its immunity to any external
interference is unequalled. There are no devia-
tions in the dose readings even at very high
EM or RF elds.
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www.mirion.com
Mirion Technologies (MGPI) Inc
5000 Highlands Parkway
Suite 150
Smyrna Georgia 30082
USA
T +1.770.432.2744
F +1.770.432.9179
Mirion Technologies (MGPI) SA
BP 1
F-13113 Lamanon
France
T +33 (0) 4 90 59 59 59
F +33 (0) 4 90 59 55 18
Mirion Technologies (RADOS) Oy
P.O. Box 506
FIN-20101 Turku
Finland
T +358 2 4684 600
F +358 2 4684 601
Mirion Technologies (RADOS) GmbH
Ruhrstrasse 49
D-22761 Hamburg
Germany
T +49 40 85193 0
F +49 40 85193 256
DIS-1 Direct Ion Storage Dosimeter
Passive Dosimetry
20996029_DIS1_EN_C
TECHNICAL SPECIFICATIONS:
Physical Characteristics
detector type: three •
TM
DIS (Direct Ion Storage)detectors and two MOSFET detectors
sensitive to gamma, X-ray and beta radiation•
insensitive to neutrons (<5 %)•
instant readout of ICRU dose equivalents:•
- Hp(10) 1 μSv to 40 Sv (0.1 mrem to 4000 rem)
1)
- Hp(0.07) 10 μSv to 40 Sv (1 mrem to 4000 rem)
1)
calibration accuracy:•
±5 % at 1 mSv
137
Cs Hp(10)
±10 % at 10 mSv
137
Cs Hp(0.07)
energy response in the dose range up to 1 Sv:•
photons
- Hp(10) ±30 % from 15 keV to 9 MeV
2)
- Hp(0.07) ±30 % from 6 keV (to 9 MeV)
beta
- Hp(0.07) -20...+35% from 0.24 MeV to 0.80 MeV (E
mean
)
angular response for photons:•
- Hp(10) ±20 % up to 60° at 65 keV
- Hp(0.07) ±20 % up to 60° at 65 keV
1)
When calibrated after every 10 Sv of accumulated dose
2)
PTB approved model up to 7 Mev
Functional Characteristics
recording of o cial Hp(10) and Hp(0.07) doses •
memory: •
- calibration date
- dose reset dates
- user identi cation
Mechanical Characteristics
size: 41 x 44 x 12 mm, with holder 47 (95 with strap) x 49 x 13 mm (1.61 x 1.73 x 0.47 in , with •
holder 1.85 (3.74 with strap) x 1.93 x 0.51 in)
weight: 25 g (0.88 oz) , with holder 43 g (1.52 oz)•
beta window: aluminized PI (app. 7 mg/cm2)•
holder: anodized aluminium•
Environmental Characteristics temperature range from -• 10°C to +50 °C ( 14 °F to 122 °F)
enclosure class: IP 67 (waterproof)•
The DBR-1 and DBR-2 Readers are designed to read DIS-1 dosimeters assembled in the DDH-2 Snap-in Dosimeter Holders. To obtain the
most recent dose value, the user simply plugs the dosimeter into the reader and the dose values are displayed in a few seconds.
Typical energy response of personal dose equivalent Hp(10)
Typical energy response of personal dose equivalent Hp(0.07)
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