A method for electro-depositing a radioactive material onto a metal substrate is disclosed. This is particularly well-suited for true random number generators. The method includes (a) at least partially masking the metal substrate to expose a metallic surface on the metal substrate; (b) connecting the metal substrate to a cathode of a current source; (c) submersing the exposed metallic surface into a solution containing radioactive metal ions, wherein the solution is connected to an anode of the current source; (d) removing the exposed metallic surface from the solution; (e) removing the solution from the exposed metallic surface; (f) measuring the amount of radioactivity emitted from the exposed metallic surface; and (g) repeating steps (c) through (f) until the amount of radioactivity measured in step (f) stabilizes relative to a previous measurement.

A method for electro-depositing a radioactive material onto a metal substrate is disclosed. This is particularly well-suited for true random number generators. The method includes (a) at least partially masking the metal substrate to expose a metallic surface on the metal substrate; (b) connecting the metal substrate to a cathode of a current source; (c) submersing the exposed metallic surface into a solution containing radioactive metal ions, wherein the solution is connected to an anode of the current source; (d) removing the exposed metallic surface from the solution; (e) removing the solution from the exposed metallic surface; (f) measuring the amount of radioactivity emitted from the exposed metallic surface; and (g) repeating steps (c) through (f) until the amount of radioactivity measured in step (f) is stabilized relative to a previous measurement.

A method for electro-depositing a radioactive material onto a metal substrate is disclosed. This is particularly well-suited for true random number generators. The method includes (a) at least partially masking the metal substrate to expose a metallic surface on the metal substrate; (b) connecting the metal substrate to a cathode of a current source; (c) submersing the exposed metallic surface into a solution containing radioactive metal ions, wherein the solution is connected to an anode of the current source; (d) removing the exposed metallic surface from the solution; (e) removing the solution from the exposed metallic surface; (f) measuring the amount of radioactivity emitted from the exposed metallic surface; and (g) repeating steps (c) through (f) until the amount of radioactivity measured in step (f) is stabilized relative to a previous measurement.

A true random number generator (TRNG) is disclosed that includes an enclosure. The enclosure enfolds radioactive source defining a radioactive source surface and a cavity separating the radioactive source from an array of cells that define an array surface with an edge. Each cell in the array comprises a detector constructed to detect electrons within the cavity from the decay of the radioactive source and to produce a signal for the detected energy. A projection of the radioactive source surface onto the array surface extends beyond the edge and encompasses the array surface.

A true random number generator (TRNG) is disclosed that includes an enclosure. The enclosure enfolds radioactive source defining a radioactive source surface and a cavity separating the radioactive source from an array of cells that define an array surface with an edge. Each cell in the array comprises a detector constructed to detect electrons within the cavity from the decay of the radioactive source and to produce a signal for the detected energy. A projection of the radioactive source surface onto the array surface extends beyond the edge and encompasses the array surface.

A true random number generator is presented that includes a CMOS matrix detector with a top surface. A shell is positioned over the top surface, and the shell includes a radiation source and a luminophore or scintillator constructed to emit photons towards the top surface when the luminophore or scintillator is struck by electrons from the radioactive decay of the source of the radiation. The CMOS detector matrix is constructed to detect the photons emitted from the luminophore or scintillator and to produce a signal for the detected photons. The signal is communicated to a processor that produces true random numbers based on the signal from the detected photons.

A structure—for use in simulating radioactive contamination environments—comprises fragments encapsulated within a substrate material. The fragments comprise radioactive isotopes with moderate half-lives. To form such structures, the fragments are encapsulated within the at least one substrate material. In a method of simulating a radioactive contamination environment, multiple removable structures, such as the aforementioned structures, are selectively placed in a facility, and may be subsequently removed, stored, and reused.

The present disclosure relates to a radiographic shield incorporating a radiographic shutter mechanism, and a protective jacket for a radiographic device. The radiographic shutter mechanism includes machined tungsten components which in some embodiments, includes a jigsaw puzzle type interconnection, the radiographic shield includes an S-shaped passageway in combination with the radiographic shutter mechanism. The protective jacket allows for various mounting configurations, such as integrated SCAR mounting configurations, including a ratchet snap configuration.

A true random number generator (TRNG) is disclosed, comprising an enclosure enclosing, a radiation source (preferably radioactive nickel), and a cavity separating the radioactive nickel from a linear array of cells. The cells include a silicon substrate with a detector constructed to detect electrons within the cavity from the decay of the nickel and to produce a signal for the detected energy. The amplifier connected to the detector amplifies the signal and passes it to the memory for storage. A control block is connected to each cell in the linear array (a) sends a word line signal to each cell, causing the memory to report its contents to an output buffer/memory via a bit line, and also (b) sends a reset signal to each cell, causing the memory to erase.

A true random number generator (TRNG) is disclosed, comprising an enclosure enclosing, a radiation source (preferably radioactive nickel), and a cavity separating the radioactive nickel from a linear array of cells. The cells include a silicon substrate with a detector constructed to detect electrons within the cavity from the decay of the nickel and to produce a signal for the detected energy. The amplifier connected to the detector amplifies the signal and passes it to the memory for storage. A control block is connected to each cell in the linear array (a) sends a word line signal to each cell, causing the memory to report its contents to an output buffer/memory via a bit line, and also (b) sends a reset signal to each cell, causing the memory to erase.