GB421341A - Improvements in or relating to apparatus for detecting, counting or otherwise measuring corpuscular radiations - Google Patents
Improvements in or relating to apparatus for detecting, counting or otherwise measuring corpuscular radiationsInfo
- Publication number
- GB421341A GB421341A GB1763733A GB1763733A GB421341A GB 421341 A GB421341 A GB 421341A GB 1763733 A GB1763733 A GB 1763733A GB 1763733 A GB1763733 A GB 1763733A GB 421341 A GB421341 A GB 421341A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- detector
- recorder
- potential
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J47/00—Tubes for determining the presence, intensity, density or energy of radiation or particles
- H01J47/08—Geiger-Müller counter tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/18—Measuring radiation intensity with counting-tube arrangements, e.g. with Geiger counters
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
421,341. Detecting and estimating radiation. WILLIAMS, C. E. WYNN-, Bron Haul, Church Walks, Llandudno, Carnarvonshire, and CAMBRIDGE INSTRUMENT CO., Ltd., Chesterton Road, Cambridge. June 21, 1933, No. 17637. [Class 97 (iii)] [See also Groups XXXVI and XL] Relates to apparatus for detecting or counting corpuscular radiations, e.g. alpha particles, beta-particles, moving electrons, cathode rays, recoil atoms, or protons, comprising a detector in which an ionization current is initiated by the radiation and is caused to raise the potential of the control electrode in a three electrode discharge device, viz. the recorder, to such an extent that a current flows in the anode circuit. the detector is a gas electric discharge device having two or more electrodes, e.g. of nickel or iron, and containing gas or vapour under suitable conditions of pressure and temperature, e.g. neon under a pressure of 5 to 10 mm. of mercury, so that with an inter-electrode potential of 200 to 350 volts, the initial ionization due to the radiation will be multiplied by ionization by collision. The recorder, which may be a " thyratron," is such that with a suitable positive potential, e.g. 100 to 300 volts, for the anode and a suitable negative potential for the control electrode no current or only a minute current passes in the anode circuit and with an increase, even momentarily, of the control electrode potential an anode current passes and continues irrespectively of the potentials applied to the control electrode. As shown, the detector 2 has a glass envelope with one or more mica windows 3. Alternatively, the envelope may be of a material through which the radiations can pass. A metal screen may be placed within or without the envelope or may form part of the envelope. The electrodes 5, 6 which may be parallel rectangular grids or coaxial cylinders are connected respectively to the control electrode 7 and anode 15 of the recorder 8. The electrode 7 is connected through resistance or choke 9 and biassing battery 10 to the heated cathode 11 and the latter is connected to the anode 15 through battery 13, switch 21, and electromagnet 16. In use an alpha-particle for example gives rise to an ionization current in the detector 2 causing the control electrode potential to change and release the anode current in the recorder. The potential of the anode 15 and therefore of the detector electrode 6 thereupon falls to about + 15 volts causing the ionization current to cease and restoring the detector to its initial condition. The anode current energizes the electromagnet 16 and rocks the spring loaded armature 17 which first moves the counter 20 and then opens the contacts 21 breaking the anode circuit. The armature 17 is then returned by the spring 18 and the recorder 8 resumes its initial state. In a modification in which different sources of potential are used for the detector and recorder, the electrode 6 is connected to the anode 15 through a condenser and to the cathode 11 through a resistance or choke and a separate battery. Alternatively, the latter battery may include the battery 13 in series. In a further modification, an auxiliary battery is included in the leads from the electrodes 5 or 6. An alternative method of interrupting the recorder anode current consists in inserting in the anode circuit a condenser and resistance or choke in parallel. The required radiation may be produced within the detector by enclosing polonium or by the action on suitable matter within the detector of gamma-rays, cosmic rays &c.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1763733A GB421341A (en) | 1933-06-21 | 1933-06-21 | Improvements in or relating to apparatus for detecting, counting or otherwise measuring corpuscular radiations |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1763733A GB421341A (en) | 1933-06-21 | 1933-06-21 | Improvements in or relating to apparatus for detecting, counting or otherwise measuring corpuscular radiations |
Publications (1)
Publication Number | Publication Date |
---|---|
GB421341A true GB421341A (en) | 1934-12-19 |
Family
ID=10098605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1763733A Expired GB421341A (en) | 1933-06-21 | 1933-06-21 | Improvements in or relating to apparatus for detecting, counting or otherwise measuring corpuscular radiations |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB421341A (en) |
-
1933
- 1933-06-21 GB GB1763733A patent/GB421341A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2408230A (en) | Measuring apparatus | |
GB828121A (en) | Apparatus responsive to the composition of a gaseous medium | |
GB1287262A (en) | Improvements in or relating to non-thermionic glow discharge devices | |
US2481964A (en) | Fast neutron meter | |
GB854594A (en) | Process and device for the electrical detection of aerosols in gases | |
US3018376A (en) | Gas density measurement | |
US2487437A (en) | Cold cathode gaseous discharge tube | |
GB913956A (en) | Improvements in and relating to ion sources | |
US2474851A (en) | Bromine counter | |
US2712088A (en) | Whitman | |
Crane | CO2‐CS2 Geiger Counter | |
US2817768A (en) | Radiation alarm | |
GB421341A (en) | Improvements in or relating to apparatus for detecting, counting or otherwise measuring corpuscular radiations | |
US2652532A (en) | Electrical vapor detector | |
Davies et al. | Secondary Ionization Processes in Hydrogen at High Gas Pressures | |
US3056123A (en) | Radiation alarm or the like | |
US3336479A (en) | Flame condition detection using a nonself-quenching ultra-violet sensitive geiger tube | |
US2383820A (en) | Apparatus and method for utilizing ionizing radiations | |
Geballe | The Production of Photons Relative to Ionization by Collision in a Townsend Gap | |
US2442314A (en) | Geiger counter improvement | |
IL26894A (en) | Amplification of gas-detector images | |
US3337733A (en) | Image amplifying device having a pulse generator applied to parallel electrodes separated by an ionizable gas | |
US2590108A (en) | Chlorine counter | |
US3717766A (en) | Spark chamber radiation-detecting device | |
US3379968A (en) | Method and means for detection of gases and vapors |