Radioactive Decay Random Number Generator Using Semiconductor Detector Arrays

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Solution Overview

Problem

Current random number generators produce pseudo-random numbers, which are deterministic and predictable, failing to meet the requirements for truly random numbers with uniform distribution and high production rates.

Innovation Solution

A system utilizing a radioactive source, detector, and processor to generate random numbers based on the unique electron emission patterns created by photon emissions, comparing splatter patterns to produce a difference matrix and classify pixels, resulting in truly random numbers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If pseudo-random number generators are used, then high production rates are achieved, but the numbers are deterministic and predictable rather than truly random

Engineering Contradiction:
Improvetrueness of randomnessVSAvoidproduction rate of random numbers
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent replaces computational algorithms (mechanical/systematic processes) with a physical phenomenon-based system. Instead of using deterministic mathematical algorithms to generate pseudo-random numbers, the invention uses the inherently random physical process of radioactive decay detected by a semiconductor detector to produce truly random numbers, thereby achieving both high reliability of randomness and high productivity through parallel detection of multiple decay events

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental parameter of random number generation from algorithmic computation to physical measurement. By measuring the actual occurrence times and positions of radioactive decay events rather than computing simulated random values, the system transforms the generation process from a deterministic computational parameter to a stochastic physical parameter, ensuring true randomness while maintaining high production rates through efficient event detection

Inventive Principle:
Principle #35Parameter changes

2Reliability

If radioactive decay measurement is used to generate random numbers, then truly random numbers are produced, but the process is slow and tedious due to slow decay rates

Engineering Contradiction:
Improvetrueness of randomnessVSAvoidgeneration rate of random numbers
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent segments the random number generation process into multiple parallel detection channels by using a semiconductor detector with multiple pixels or detection regions. Instead of waiting for single sequential decay events, the system simultaneously detects multiple decay events across different spatial segments of the detector, thereby multiplying the effective generation rate while maintaining the true randomness of each individual decay measurement

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent adds a spatial dimension to the random number generation process by using a two-dimensional semiconductor detector array. Instead of measuring only temporal intervals between decays in one dimension, the system captures both temporal and spatial information from decay events across the detector surface, enabling parallel processing of multiple events and significantly increasing the production rate of random numbers while preserving the inherent randomness of radioactive decay

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Reliability

If traditional radioactive decay measurement is used, then random numbers are generated, but the system is costly and complex to manufacture

Engineering Contradiction:
Improvetrueness of randomnessVSAvoidmanufacturing simplicity and cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs a semiconductor detector, which is a relatively inexpensive and commercially available component compared to specialized radiation detection equipment. The system uses standard semiconductor fabrication techniques and off-the-shelf detector modules, making the random number generator cost-effective and easy to manufacture while still providing true randomness through radioactive decay measurement

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent uses a semiconductor detector that serves multiple functions: detecting radioactive decay events, providing spatial resolution for random number generation, and enabling parallel event processing. This multi-functional component replaces what would otherwise require separate specialized devices for each function, simplifying the overall system architecture and reducing manufacturing complexity and cost while maintaining the reliability of true random number generation

Inventive Principle:
Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system effectively generates high-rate, cost-effective, and truly random numbers by leveraging the randomness of radioactive decay patterns, overcoming the limitations of existing pseudo-random number generators.

Implementation Method 1

The radioactive source emits photons, which causes the release of electrons in the detector

Methodology Applied
Scientific EffectRadioactive decay: Radioactive Decay

Implementation Method 2

The radioactive source emits photons, which causes the release of electrons in the detector

Methodology Applied
Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS10496376B2Random number generator
Publication Date: 2019.12.03 MASSACHUSETTS INST OF TECH
  • US10496376B2 patent drawing
  • US10496376B2 patent drawing
  • US10496376B2 patent drawing

AI summary

A novel system for generating random numbers is disclosed. The radioactive source emits photons, which causes the release of electrons on the surface of the detector. The detector is configured as a two dimensional array having a plurality of pixels. This release of electrons creates a splatter pattern on the detector, which is then read by the processor. Subsequent photon emissions create a second splatter pattern, which is then read by the processor. The processor compares these two splatter patterns, and generates random numbers based on these two splatter patterns. In certain embodiments, the processor creates a difference matrix which represents a comparison of the two splatter patterns. The processor then classifies each pixel in the difference matrix in accordance with certain rules. In certain embodiments, these classification rules may vary as a function of time or as a function of where on the detector the pixel is disposed.