Features
- Vented sensitive volume of 10 cm3
- Measures the Hp(10) personal dose equivalent directly
- Suitable as a reference chamber for Hp(10) calibration
The parallel plate ionization chamber model 340351 is integrated into a slab phantom to measure the Hp(10) radiation protection measuring quantity directly. The high performance chamber is designed to be used as a secondary standard chamber for calibration purposes. The beam calibration with the Hp(10) chamber makes it unnecessary to precisely determine the spectrum of the X-ray beam. The chamber comes uncalibrated; a primary standard calibration by PTB, the German National Laboratory, is available. The chamber set includes a phantom slab of 31 mm thickness with chamber assembly and an additional PMMA phantom slab of 120 mm thickness. Both sets available include an adapter cable to connect the chamber either to a dosemeter with M connector or with BNC connector and banana pin. The Hp(10) chamber should be used in connection with a high quality dosemeter such as UNIDOS, UNIDOS E or UNIDOSwebline to ensure best performance.
Specifications
| Type of product | vented parallel plate chamber |
|---|---|
| Application | radiation protection measurements |
| Measuring quantity | Hp(10) personal dose equivalent |
| Nominal sensitive volume | 10 cm3 |
| Design | not waterproof, vented |
| Reference conditions | 20°C, 1013 hPa 65 % rel. humidity |
| Reference point | chamber center, 13.5 mm below chamber surface or 15.5 mm below surface of integrated step cylinder |
| Nominal response |
350 nC/Sv |
| Chamber voltage | 400 V nominal |
| Leakage current |
≤ ± 10 fA |
| Cable leakage | ≤ 1 pC/(Gy·cm) |
Materials and measures
| Phantom material | PMMA |
|---|---|
| Outer dimensions | 300 mm x 300 mm |
|
chamber assembly |
height 31 mm |
| additional slab phantom | height 120 mm |
Useful Ranges
| Chamber voltage | ± (300 … 500) V |
|---|---|
| Radiation quality | (15 … 1400) keV |
| Temperature | (10 … 40) °C (50 … 104) °F |
| Humidity |
(10 … 80) %, max 20 g/m3 |
| Air pressure | (700 … 1060) hPa |
Options
PTB Primary standard calibration upon request
- Ankerhold, Ambrosi, Eberle ? A chamber for determining the conventionally true value of Hp(10) and H*(10) needed by calibration laboratories ? Rad. Prot. Dos. Vol. 96, Nos 1-3, pp. 133 – 137 (2001), Nucl. Techn. Publishing
Parts
L981937 Hp(10) Secondary standard chamber type 34035, connecting system M
L981938 Hp(10) Secondary standard chamber type 34035, connecting system BNC and banana pin
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