FR2258640A1 - Negative ion flux measuring device - has electronic valve connected through amplifier to digital voltmeter - Google Patents
Negative ion flux measuring device - has electronic valve connected through amplifier to digital voltmeterInfo
- Publication number
- FR2258640A1 FR2258640A1 FR7401801A FR7401801A FR2258640A1 FR 2258640 A1 FR2258640 A1 FR 2258640A1 FR 7401801 A FR7401801 A FR 7401801A FR 7401801 A FR7401801 A FR 7401801A FR 2258640 A1 FR2258640 A1 FR 2258640A1
- Authority
- FR
- France
- Prior art keywords
- amplifier
- digital voltmeter
- measuring device
- negative ion
- valve connected
- 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.)
- Granted
Links
Classifications
-
- 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
- G01T1/185—Measuring radiation intensity with ionisation chamber arrangements
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)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The grid of a valve in a measuring circuit is connected through a selector (51) to suitable matching resistors for sources of negative ions (N). The valve cathode is biased at -60 volts while the screen is supplied with +60 volts through a potentiometer (P1) which is used to null the output. The anode is isolated from potentials and is connected through a potentiometer (P2) to an integrated circuit pre-amplifier (CI) whose output is connected to a power amplifier comprising four transistors (T1, 2, 3, 4). The output is converted to a voltage by a resistor (R4) in series with a capacitor (C4) for application to a digital voltmeter (VN).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7401801A FR2258640A1 (en) | 1974-01-18 | 1974-01-18 | Negative ion flux measuring device - has electronic valve connected through amplifier to digital voltmeter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7401801A FR2258640A1 (en) | 1974-01-18 | 1974-01-18 | Negative ion flux measuring device - has electronic valve connected through amplifier to digital voltmeter |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2258640A1 true FR2258640A1 (en) | 1975-08-18 |
FR2258640B1 FR2258640B1 (en) | 1978-01-06 |
Family
ID=9133687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7401801A Granted FR2258640A1 (en) | 1974-01-18 | 1974-01-18 | Negative ion flux measuring device - has electronic valve connected through amplifier to digital voltmeter |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2258640A1 (en) |
-
1974
- 1974-01-18 FR FR7401801A patent/FR2258640A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2258640B1 (en) | 1978-01-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |