Analog Computers

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Atomic Pile Simulator “DJINN” — Laboratoires René Derveaux Product Brochure

This document is a full English translation of the original French-language brochure (fr) published by Laboratoires R. Derveaux, France.

PAGE 1 — Cover

Atomic Pile Simulator “DJINN”

From Laboratoires René Derveaux

Whether the problem concerns:

  • Neutronics
  • Kinetics
  • Pile control
  • Electronics
  • Servo-mechanisms
  • Control panels

All such problems are dealt with entirely by the “DJINN” Pile Simulator.

All your problems — Atomic Pile Control · Neutronics · Kinetics · Electronics · Servo-Mechanisms · Control Board — are entirely dealt with by Pile Simulator “DJINN”.

(The cover shows a large console-type analog computer on the upper left and a rack-mounted unit with display panel on the lower right. An illustration of a nuclear reactor building appears in the upper right.)

PAGE 2 — Ensemble: Atomic Pile Simulator / Measurement and Control Instruments for All Radiations

ANALOG CALCULATOR — “DJINN” TYPE 30 A5 P.

The “simulator de pile” (pile simulator) of the “DJINN” type, equipped with 30 DC amplifiers and 84 potentiometers, permits, after a six-month apprenticeship, the study, preparation, and monitoring of reactor procedures en conditions of simulation.

It solves:

  1. Problems of kinetics of piles by treating groups of 4 to 5 precursor families within the bounds of complexity required.
  2. Problems of poisoning calculation taking into account the effects of temperature.
  3. Problems of measurement-monitoring on a simulator.

Its special feature is that it gives the user, after a short apprenticeship, all the fundamentals of pile research.

Dynamic accuracy: 0.5 %

MODEL 30 A5 P — “DJINN” ANALOG COMPUTER

This “nuclear pile simulator” analog computer has been conceived with a particular point of special design for the study, preparation, and monitoring of reactor procedures under simulated conditions. It allows the user to solve: (1) Pile kinetics problems treating 4 to 5 groups of precursor families; (2) Poisoning, in particular the research for xenon reactivity; (3) Measurement and control problems.

A special feature of the “DJINN” calculator is its “Similarity Control” function, which continuously checks the correct simulator operation.

Dynamic accuracy: 0.5 %

MEASURING UNIT D.O.S.I. — D.O.S.I. MEASURING CABINET

Designed to accompany the “DJINN” computer, the measuring cabinet:

(1) A set of control circuits which enable the testing of the calibrating and trapping of the computer with an accuracy of 0.5 %. (2) Various instruments: Cathode Ray Oscillograph for display showing on an appropriate scale the simulated function; MPRS type recorder (e.g., Sefram or Honeywell), for the recording of the parameters.

DIGITAL GAMMASCOPE — TYPE 60 C.

  • Sensitivity: adjustable
  • Reading: in calibrated quantities

All applications with neutron or radiation density detectors, from low to ultra-high fluxes, this device serves within the domain of pile study particularly.

DIGITAL SAMAFLOC TYPE 4

  • Compact counter
  • Quantified detector compatible

Available: 6 ranges — 6 significant figures (Details in Samafloc-specific documentation)

PORTABLE IONIZATION CHAMBER — “Babylby” — MODELS R AND C.I.A. PATENT

This apparatus is destined for the protection of persons:

  • Chamber R: ranges 0.5 to 500 mR/hr, accuracy 10 %
  • Chamber CIA: range 0 to 15 CES units

All battery-operated. Operating voltage: 150 V batteries.

PAGE 3 — Instruments for the Measuring of All Types of Radiations

D.C. AMPLIFIER — C.E.A. PATENT

Amplifier and pre-amplifier equipment. Input resistance: up to 10¹⁰ ohms. Sensitivity: current 3 mV per hour. Accuracy 1 %.

Ranges: 30 mV, 100 mV, 200 mV, 20 V Current sensitivity: 10⁻¹⁵ A (femtoampere)

(up to 5 × 10⁻⁶ ampere range, accuracy 1 %, drift 1–3 mV per hour)

QUANTIFIED VOLTMETER — Model VQ 1 MR

Gauge range: — 100 V to 100 V Reading via decimal tubes (eights). Reference: quartz at 1 Mc/s Scale: 100 volts = 1,000 units

MODEL VQ 1 MR QUANTIFIED VOLTMETER Range: −100 V to +100 V EHT (extra-high tension) — decade tube reading Frequency standard: crystal Scale: 1000 units = 100 volts

IONIZATION CHAMBERS

The Laboratoires Derveaux undertake the study and development of all types of ionization chambers:

  • Ray Chambers (X-ray)
  • BK5 Bakelite Chambers
  • Baron carbon-type chambers

Compensation range within 2 to 4.

5,000 VOLT SUPPLY — C.E.A. PATENT (5,000 V POWER SUPPLY)

  • Feeds amplifiers, photomultipliers, ionization chambers
  • Adjustable from 0 to 5,000 V
  • Output: 500 µA
  • Regulation: 0.2 %

LABORATORY POWER SUPPLY — Type CNS 250 A (MODEL CNS 250 A)

  • Alimentation: high precision
  • Internal resistance: 0.05 ohms
  • Stability: 1/10,000
  • Adjustable in steps from 0 to 250 volts
  • 4 terminals providing any setting between 0 V and 250 V

High precision — variable power supply Internal Resistance: 0.05 ohms · Stability: 1/10,000 Adjustable in fine steps from 0 to 250 V; four output terminals for obtaining any value between 0 V and 250 V.

SUBMINIATURE ELECTROMETRIC AMPLIFIER — Type E.100-10

Grid current at input tube: 10⁻¹² A DC Gain: 200,000 Output power: 1 Watt

SUBMINIATURE ELECTRONIC AMPLIFIER — Model E.100-10

Grid current at input tube: 10⁻¹² A DC Gain: 20,000 Output power: 1 Watt

These instruments represent some specimens of our various achievements.

LABORATOIRES RENÉ DERVEAUX Société à responsabilité limitée Direction Générale et Services Commerciaux: 4, rue Jules Simon — Boulogne-sur-Seine (France) Direction Technique et Services Commerciaux: 4, rue Jules Simon — Boulogne-sur-Seine

(Telephone and telex details visible but partially illegible in scan)