&amp;#x03B1;RAM: An &amp;#x03B1; particle detecting MOS IC for radon monitoring

Griffin, Ryan H.; Le, Hoang Viet; Jack, D.T.; Tarr, N. G.

doi:10.1109/mnrc.2008.4683381

Cited by 5 publications

(16 citation statements)

References 8 publications

(8 reference statements)

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“…Details of these systems have been presented elsewhere. [4], [5] Recently a second generation radon detector based on the work presented in [6], [7] has been designed, built and tested. This detector uses a custom α-particle detecting IC with an electrostatic concentrator to detect α-emitting radon progeny.…”

Section: Introductionmentioning

confidence: 99%

Sensitive, fast-responding passive electrostatic radon monitor

Griffin

Kochermin

Tarr

et al. 2011

2011 IEEE SENSORS Proceedings

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A second generation fast-responding passive radon detector using electrostatic concentration and enhanced readout electronics has been designed, built and tested. This detector utilizes the custom α-detecting IC called αRAM. In order to assess the response time, simulations were performed to analyze the turn-on transient of the detector. In an ambient with constant radon concentration, simulations indicate 1.44 hours will be required for the detector to reach 90% of its maximum count rate. This result is consistent with experimental findings using both first and second generation passive radon detectors.

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Section: Introductionmentioning

confidence: 99%

Sensitive, fast-responding passive electrostatic radon monitor

Griffin

Kochermin

Tarr

et al. 2011

2011 IEEE SENSORS Proceedings

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“…A solution for radon detection using silicon diodes was developed at Carleton University by R.H. Griffin and discussed in [4,5,[19][20][21][22][23]. This monitor used an IC containing an array of pn diodes to detect alpha particle radiation from radon progeny.…”

Section: Alpha Particle-detecting Mos Integrated Circuitmentioning

confidence: 99%

“…The CMOS alpha particle-detecting IC was designed following an approach similar to that used for the MOS IC in [4,5,[19][20][21][22][23]. The alpha particle sensitive silicon diodes, or sense diodes, are structured in a 16×16 array as shown in Figure 3.1.…”

Section: Cmos Icmentioning

confidence: 99%

“…The alpha particle sensitive silicon diodes, or sense diodes, are structured in a 16×16 array as shown in Figure 3.1. This structure, like in [4,5,[19][20][21][22][23], is similar to the folded bit line architecture often used in DRAM [15]. To measure their voltage, the sense diodes are connected via transmission gates to their respective bit lines.…”

Section: Cmos Icmentioning

confidence: 99%

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Radon Detection Using CMOS Alpha Sensor

Ross¹

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A radon monitor based on a 3 mm×3 mm alpha particle-detecting IC fabricated in a foundry CMOS process is reported. The alpha-detecting IC consists of a 16×16 array of pn junction diodes (sense diodes) that are precharged in reverse bias and then allowed to electrically float. Radon progeny are collected on the IC using an electrostatic concentrator. On-chip comparators detect the voltage change induced in a sense diode by an alpha particle emission from radon progeny passing though a sense diode. The comparator outputs are monitored by a microcontroller which processes the data and transmits it to a microcomputer using Bluetooth. The monitor has a sensitivity of 1.12 counts per hour per 100 Bq/m 3 of radon activity. The monitor appears suitable for mass production at very low cost.ii Acknowledgments I would like to thank N. Mikhail and S. Follows for their assistance in providing equipment and assistance in testing the alpha-detecting CMOS IC and radon monitor.The contribution of the many students who designed and tested earlier versions of the radon monitors is also gratefully acknowledged. Lastly, I would like to thank Dr. N.Garry Tarr and Dr. Ryan H. Griffin for their supervision and guidance throughout my involvement in this research.iii to the sense bit line of the alpha particle-detecting CMOS IC. V refVoltage of the reference diode. xii V ref BlVoltage of the reference bit line.V sense Voltage of the sense diode.V senseBl Voltage of the sense bit line.V strike Voltage change in a sense diode due to an alpha particle strike (theoretically 250 mV). V switchThe input voltage where the analog comparator's output voltage is 50% of logic High voltage.xiii Chapter 1

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“…Assessing the ability of the chelator to retain the particular isotope used is an important task and one to which an arrayed α particle sensitive integrated circuit (IC) compatible with TAT testing protocols would be well suited. A MOS IC designed by the author, and fabricated at Carleton University, was used for this demonstration [16][17][18]. Work was also done on guiding the development of the next generation version of the α sensitive IC used in these measurements suitable for fabrication at a commercial foundry.…”

Section: Objectivesmentioning

confidence: 99%

Novel MOS-Based Biomolecule Detection Techniques

Griffin¹

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αRAM: An α particle detecting MOS IC for radon monitoring

Cited by 5 publications

References 8 publications

Sensitive, fast-responding passive electrostatic radon monitor

Sensitive, fast-responding passive electrostatic radon monitor

Radon Detection Using CMOS Alpha Sensor

Novel MOS-Based Biomolecule Detection Techniques

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