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Gamma Spectroscopy with Silicon Photomultiplier SiPM MicroFC 60035 SMT and CsI(Tl) scintillation crystal MicroFC-60035-SMT manufactured by Sensl is 6x6mm SiPM silicon photomultiplier sensor. The C series 60035 has P-on-N type structure and used for blue range light, that's why it fit perfectly CsI(Tl) scintillation crystal. I made a prototype project that plugged into computer audio card and it works as an amateur gamma spectroscopy detector. The prototype board has bias voltage converter for SiPM with negative output of -30V. And it has pulse amplifier to make the signal compatible with 192kHz audio card input. To read out the SiPM from the standard output, the photocurrent generated on detection of photons needs to be converted into voltage. That task can be achieved using a transimpedance amplifier (TIA). The circuit is powered with one 9V battery. It power up automatically when TRS 3.5mm cable is plugged into the socket. Using SiPM for gamma spectroscopy has pros and cons. The price for SiPM is approximately equal to a classic photomultiplier tube. But the active area of 6x6mm limits the maximum size of an applicable crystal for gamma spectrometry. That's why if you are looking for high performance spectroscopy system with a big crystal then SiPM is not the choice. However it can be used in miniature constructions where you can compromise for efficiency and resolution. ​ Because SiPM require low voltage bias of ~30V in contrast with 1000V for classic photomultiplier tube, it also can be additional advantage for an amateur simple project. If you follow all design recommendation published by Sensl and if you make correct calculation and adjustments for TIA then you can end up with pretty good resolution and acceptable linearity for the SiPM detector. My sample has FWHM% resolution <7.3% on Cs-137 662keV. It can be used to collect gamma spectra in range of 32keV-3000keV. ​ The overall performance of the detector is good, in my opinion. Even the SiPM little bit noisy on low energy, but the size and weight of the whole construction makes it attractive same as a classic vacuum tube detectors. Big disadvantage of non-compensated SiPM detector is the gain drifts caused by the temperature changes. During the temperature drops from 44.4C to 8.5C the Eu-152 1408keV peak shifted to about 463 channels up. The resolution, noise level and SiPM amplification improved as temperature goes down. As expected, the semiconductor behaves better with lower temperature. But that huge drifting for channels is not acceptable for portable instrument, and even not for laboratory testing due to day and night temperature changes. ​ Small prototype board was assembled to resolve that problem, based on the previous circuit but with hardware correction added for temperature's changes. With the correction, the channels drift was fixed over same temperature range. You can see at high temperature (red line) it still has more noise and resolution degradation, however all channels stay at the same position. That make great difference for long-term spectrum stability and portable usage of SiPM based devices. If you want to order SiPM driver board with bias voltage and temperature correction for MicroFC60035 then please check my product: USB Gamma Spectrometer Audio ADC for MPPC SiPM MicroFC-60035 The electronics include: Audio USB ADC for Theremino MCA, 30V bias voltage for SiPM and basic temperature correction circuit. ​ ​

Gamma Photon Nuclear Radiation Detector with PIN Diode PINRAD gamma detector project. Maxim Integrated Application Notes 2236 ​ As you know, PIN diode can be used for detection of gamma radiation. Maxim Integrated announced a good materials for the experimental building of such type detector. Here you can find my implementation, including oscilloscope screenshots and short video. The PCB installed into metal coffe can with 6.5mm audio socket. Metal box is required for light and EMI shielding. I added a transistor filter on the 15V VDD line for the PIN diode. This circuit cut VDD noise and improve output signal purity. Because of small active surface of the diode, usually PIN detector has very weak reaction to the natural background. Actually low energy sources below 100keV was not detectable by the PIN diodes I have. But it can be used as a basic detector for radioactive isotopes, however not robust as a Geiger Tube. The circuit has two points where you can capture the signals: TP1 and comparator output Vout. Each pulse is about 5uS. The amplitude on TP1 depend on gamma photon energy. The amplitude of pulses is vary between 200mV-1000V. Otherwise, comparator Vout is 5V 5uS rectangular shape pulses that can be connected to micro-controller input for counting. ​ The upper module has signal mixer gates and cable driver. One 74HC14 works perfect for this goal.The digitalized buffered signal output from the can probe is 1uS - 5uS rectangular shape positive pulses. ​ The PCB's installed one above the second with interconnection wires. After that you need to solder it to the can cover as on the pictures above. Each module need to be tested separately. Remove D1 or D2, depend which module you need to test first and check with the scope you get signal output from each module. If there any problem, start to test signal output from TP1 point directly. Some diodes has very low sensitivity, at least 1 of the 5 pieces I have in stock didn't triggered pulses at all. So I recommend to purchase several pieces from different batches in advance. ​ The pulse counter circuit build with PIC16F628A microprocessor and 16x2 HD44780 LCD. The counter board is less sensitive to layout quality. Lithium charger IC MCP73831T can be replaced with any ready lipo charge module from eBay or from Sparkfun. TPS78330 can be replaced with other low-drop 3V regulator. To allow low VDD support I disabled brownout reset in firmware. But if your specific sample of PIC16F628A will not operate stable at low VDD 3V then you can increase VDD to 3.3V, or power the processor from battery voltage directly. If you remove TPS78330 from the circuit take note that LCD contrast will require modification. R31 value need to be selected between 1.5K-5.6K depend on LCD contrast, try different values if your LCD is over-contrasted or non-visible. To feed the can probe I selected Pololu 4V-25V step-up adjustable module because it very efficient and miniature. The can probe can be connected to the counter board with 1 meters of audio cable. Because the current drawn of each PIN diode board is 10mA, select the cable with lowest DC resistance. ​ Download PIC16F628A firmware for "PINRAD" detector with PCB layout for DIY ver.1.00 ​ The modules layout in PDF is mirrored and ready for print-out if you make DIY etching PCB's. Because of PIN diodes variety of sensitivity there is no way for clear and precise dose rate calibration, like it already done in DIY Geiger kits with Geiger tubes. The only one parameter the PIC software is counting is CPM (counts per minute). My PIN diodes samples I got from Digikey is QSE773 and BPW34. Both types where non sensitive to low range of nuclear energy of 60keV and non sensitive to natural background. But it detect higher energy isotopes, as uranium, thorium and cesium. I'll post here later more detailed information about energy range sensitivity. Do not expect that PINRAD detector will be robust as DIY Geiger with SBM-20 or pancake tube. This is education project and not efficient detector for low radiation level. I would say as long as it education project, it also emergency type detector that starts beeping only when radioactive level in air are dangerous, or when you apply isotope in front of PIN diode area. The video of captured pulses on the scope. The base level of noises in the video is high because the video was taken before I added transistor filter on bias voltage of PIN diode:

Unique sell - is the category for new and used assembled detectors & gamma spectrometers. All items in that category where made in small production line, that's why stock can be limited to a few pieces only. Please review every item description carefully and if you have any question you are welcome to contact us for more details. If the item is out of stock, you are welcome to contact us for manufacturing quote. ​ Nuclear Pioneer MCA RIID PRO Gamma Spectrometer (without probe) Price 995.00$ Add to Cart Nuclear Pioneer MCA Multichannel Analyzer for Gamma Spectrometry (without probe) Price 995.00$ Add to Cart Nuclear Pioneer MCA RIID Multichannel Analyzer with NaI(Tl) scintillation probe Price 2,500.00$ Add to Cart Nuclear Pioneer MCA RIID with NaI(Tl) scintillation probe Price 950.00$ Out of Stock Multi channel Analyzer MCA Scintillation Survey Meter with tiny CsI(Tl) detector Price 550.00$ Pre-Order Multi channel Analyzer MCA ver.3 Scintillation Survey Meter (without probe) Price 550.00$ Add to Cart MPPC SiPM CsI(Tl) 6x6x25mm <7% USB Gamma Spectrometer for Theremino BecqMoni PRA Price 550.00$ Out of Stock MPPC SiPM CsI(Tl) 6x6x30mm <9% USB Gamma Spectrometer for Theremino BecqMoni PRA Price 550.00$ Add to Cart

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UART Spectrum Utility for MCA ver.1 Since 1.06 firmware MCA ver.1 can be used as an UART-USB live data spectrometer. MCA just dump the spectrum data, the hardware cannot be controlled via UART commands. To use Spectrum Utility with your MCA ver.1 module you need the updated firmware and CP2102 USB-TTL module. Current version of the PC software is the beta version, you are welcome to send me an email if you see any bug. The software require Microsoft .NET Framework 4.5.2 installed on your computer. CP2102 module is wired with RX and GND pins to the MCA module as shown in the diagram. In the UART mode the button on processor pin RB6 is not active because the pin is used for the data transfer. To activate UART mode in the MCA module navigate to the Menu -> Mode -> UAT To exit from UART mode press button on RB7 ​ DOWNLOAD Spectrum Utility ​

DIY Multi Channel Analyzer MCA project with NaI(Tl) Gamma Spectroscopy Detector I started my very early experiments in DIY Gamma Spectroscopy field in the middle of 2015 year. My first results where published on the old RH website and later I moved the article into PDF archive. The PDF now available here: My First DIY Gamma Spectroscopy Project ​ However some links inside that document maybe outdated or irrelevant by today. In this article I just want to share my work-log process of creating homemade DIY Gamma Spectroscopy detector with MCA. It's not a guide with full technical details, I share only photos of the assembling without publishing any electrical circuit. Step 1: Making NaI(Tl) Detector: When I started the project, I decided to make portable battery operated device with good linearity and FWHM% resolution less than 8%. The circuit evolves high voltage for a photomultiplier tube, it has analog electronics to process pulse shape and it has digital electronics to count pulses and analyze spectra. The detector build with R9420 Hamamtsu photomultiplier tube and 30x40mm NaI(Tl) scintillation crystal. The crystal is optically coupled to the tube photo-cathode window. Tube is covered with several layers of electrical tape to prevent any external light photons from entering into photo-cathode. When a gamma ray strikes the crystal it produce micro light flash that intended to be detected by PMT tube. The intensity of the light flash consist information about energy of the gamma ray. To drive the PMT tube we need high voltage. I created miniature and stabilized step-up 5V to 1000V converter. When you deal with gamma spectroscopy you need strictly regulated high voltage with good temperature compensation and long term stability. Modern electronic components allows to create this design. The driver also includes voltage divider for dynodes and pulse-processing charge sensitive amplifier installed directly on anode wire. This compact design has low noise signal and helps to avoid ground loops. The enclosure made with aluminum tube on home lathe machine. I'm not professional CNC, everything is done with manual work. Under the cover (not shown on the photos) I installed additional small board with LiPO battery, charger and LED indicator. The detector power up automatically when cable is connected. Charging of the battery can be done with same cable and any 5V adapter. You can see typical pulse shape scope screen from the detector. As is, it can be used with any computer based MCA software, for example PRA, Theremino or BecqMonitor2011. These software uses audio cart to analyze the signal. After 2 or 3 evenings I spent on detector adjustments to find optimal high voltage and amplifier settings it ends up with pretty good linearity and ~7.30% FWHM% on 662keV Step 2: Making Portable MCA Because I planned to use my detector as a portable device, I made Multi Channel Analyzer that can capture signal and save spectra to uSD cart in CSV format. I used MHH-95A enclosure and created PCB design of my MCA that fit this enclosure. The MCA has 8-bit PIC18 microprocessor with 10-bit ADC 1024 channels. 128x64 display show only partial information of spectra. Full 1024 bins data is saved to SD cart and can be opened later by BecqMonitor2011. The MCA electronics powered by 2xAA batteries. It has 2 buttons to control the software and one button for On/Off. The MCA and detector where adjusted for energy range up to 3000keV. Here is the photo during making a spectra for Co-60 - Cs-137 weak source from Russian SRP dosimeter. Step 3: Results The whole setup can detect gamma energy in range of 20keV-3000keV, has good linearity and ~7.30% FWHM% at 662keV. ​ ​ Step 4: Conclusions and Cost The project is NOT cheap. I don't have exact cost summary for every part I used in this project, but the most expensive are: ​ 1. NaI(Tl) crystal. I purchased this sample new for about $200. It expensive mostly because it has guaranteed resolution and it manufactured in nowadays. ​ 2. R9420 Photomultiplier Tube. $60 The PMT tube I used is not new, but in good condition from trusted supplier Tom iRad. ​ 3. Enclosure manufacturing. Even I do it by myself it has cost and need a lot of time. The materials in small quantity I buy are expensive, for example tube, aluminum rod and plastic can cost you about $100 including shipping, you also need to add machining costs on tools, inserts etc. ​ 4. Electronics prototyping and PCB manufacturing. The cost is high - I even cannot count the total hours, days and months I spent on this subject. The MCA microprocessor software wrote by me too. It took for me too many resources and time, as a self-employed maker and student I choose not to share my source files because it will never cover my costs indeed, sorry. But if you are creative and open to cooperation, you can write me a proposal for business cooperation. ​ 5. All other parts around like cables, jacks, batteries, materials, glues, tapes and etc are about $100, yes small things makes difference here... ​ The conclusions: In my opinion the project has great performance. I can analyze food, mushrooms, berries, find radon daughters in rain water, test concrete materials or minerals for radioactive isotopes in range of gamma energy 20keV-3000keV. Even with all high cost as a DIY project, it still very cheap if you compare it with professional laboratory grade gamma spectrometers. Most common and dangerous gamma isotopes can be easily detected by the device. Demonstration Videos: ​

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Terms and Conditions RH Electronics Shipping & Delivery Your order will be dispatched within 5-7 working days after receiving full payment. Please read our Shipping & Tracking page for more information about shipping methods. If the event of a serious delay in the delivery of your order, and after first checking tracking information, please contact us by email. We will ask the postal services to track the delivery. If the package was lost due to postal failure we'll offer you full refund or resend. Refund for non-delivery in countries with especially slow delivery can only be made 60 days after parcel dispatch. The buyer is responsible for providing a valid, verifiable delivery address in the PayPal order or account. We cannot be responsible if the package was lost due to incorrect address as mistakenly provided on the order. Returns & Replacements We accept return of any item purchased if it wasn't used or soldered. Israeli customers can return items up to 14 days after purchase. International customers can send items back up to 30 days after date of delivery. The customer pays for return shipping cost. If you decide to return your order please first contact our support by email or phone to receive the preferred return address for sending it back. Any of our DIY kits cannot be restocked if you started to use or solder it, that's why you have to return DIY kit in the same condition and the same parts quantities as delivered: unopened, undamaged, unused, non-soldered via registered air mail (with tracking number), packed carefully. After we received the returned parcel your PayPal account we'll be refunded. In the matter of returns, we only can refund the original price without shipping cost. If you received broken or defective items we'll resend you the exchange or replacement of those items, if we have items in stock. If not available you will be refunded for the component(s). Please send us a photo of the broken or defective items received as soon possible after their delivery. Repair Service Due to DIY purpose of all kits we are not obligated for repair service, but in some circumstance we can offer free repair service for DIY kits. A buyer will be asked to cover postage and components cost. All kits comes with lifetime technical support, so you always can ask for help if something fail later. Ordering All orders placed online through website interface. If you have a special order request please email us to get PayPal invoice. Payments For international orders we accept Credit Cards, PayPal, Western Union or Wire Transfer. Customs Fee & VAT Israeli buyer requested to pay VAT17% that will be automatically added to your shopping cart as "Tax". All other countries, except Israel, are free of Israeli VAT. All international buyers are responsible to cover any possible custom fee or import tax that maybe applied at his/her country. We are obligated by export law of Israel to declare an order price as it was stated in your invoice. You are responsible for any VAT, tariff, duty, taxes, handling fees, brokerage charges, customs clearance charges, etc. required by your country for importing consumer goods. There is no way for RH Electronics (the shipper) to predict your country's customs/fee habits, so be prepared to pay full VAT on the fully declared value of your order as well as any customs fees your postal system may charge you! If you do not pay the required brokerage fees, VAT, tariff, duty, taxes, handling fees, customs clearance charges, etc - we cannot issue any refunds. Notice RH Electronics reserves the right to cancel any order with full refund from customers that do not abide by above listed rules. ​ We do not provide customer service & shipping to Russian Federation and Belarus. ​

Ionizing Nuclear Radiation Detectors: PINRAD Gamma Photon Nuclear Radiation Detector with PIN Diode DIY Multi-Channel Analyzer MCA project with NaI(Tl) Gamma Spectroscopy Detector Gamma Spectroscopy with Silicon Photomultiplier SiPM MicroFC 60035 SMT and CsI(Tl) scintillation crystal ​ J305 Glassy Geiger Muller Tube Nuclear Radiation Sensor Price 50.00$ Add to Cart SBM-20 Geiger Muller Tube Nuclear Radiation Sensor Price 75.00$ Out of Stock Hamamatsu R1450 PMT Photomultiplier Tube 19mm for Scintillation Counter Price 120.00$ Add to Cart

UART Rad Logger “Radiation Logger” - Windows freeware open source application that intended to display real-time doserate and CPM data flow from a DIY Geiger Counter connected through UART. The software can save logging files on your computer or upload CPM data to online Radiation Monitoring servers. ​ MyGeiger ver.3 PRO has built-in USB support and it allows you to connect with USB cable directly. All other kits require a USB-TTL module. ​ Logs files created in *.csv format and it used for graphs plotting later. Since 1.4 version application also support logging to http://xively.com and logging to http://radmon.org . Connection settings are configurable that make this software universal and allow other similar hardware to be used. If you build your own dosimeter just configure your MCU to send CPM string value via UART. Logging period time between the data transmissions from hardware to software can be any, from 1 second to several minutes! ​ DOWNLOAD RADIATION LOGGER (1.4.1.0) DOWNLOAD RADIATION LOGGER (1.5.0.0) DOWNLOAD RADIATION LOGGER SOURCE FILES How to configure Radiation Logger: Radiation Logger it's very easy to set-up application. Before you run the logger, check if your USB-TTL adapter appears correctly in Windows device manager. For all kits, except MyGeiger, you need to connect 4 wires: RX -> TX; TX -> RX; 5V -> 5V; GND -> GND. MyGeiger needs only mini-USB cable connection without the wires mess. ​ Open Radiation Logger application and navigate File -> Settings . Press "Get Available Ports" and select the same COM port number where your device is connected. Speed settings can be different for Arduino counters, that's why refer kit documentation to select right parameters. Press "Test Connection" and if the hardware was linked correctly then during 5-10 seconds you will get connection confirmation. Press "Save and Close" to close settings menu.

Function Generator XR2206 DIY Kit 20Hz - 100KHz Price 25.00$ Out of Stock Active Amplifier for Magnetic HF Antenna 3MHz-30MHz Hula Loop Shortwave Radio Price 25.00$ Add to Cart High Resolution Capacitance Meter DIY Kit (Advanced Edition) with LCD Price 39.95$ Add to Cart Frequency Counter DIY Kit Module Price 35.00$ Out of Stock

RH-Electronics Equipment for radiation detection Nuclear Pioneer RIID MCA The MCA can work as a robust Gamma Spectrometer and as a Scintillation Counter Survey Meter. Nuclear Pioneer has high count rate performance for spectrum mode and for scintillation search mode. Software can automatically identify isotopes. The hardware has regulated high voltage circuit with adjustable output of 600V-1000V positive polarity that allows to connect a NaI(Tl) probe with BNC cable. Depending on probe & crystal efficiency and the MCA settings, you can get gamma ray spectrum in range of 26keV - 3000keV. MPPC Silicon Photomultiplier (SiPM) board Driver board of USB DIY Gamma Spectrometer for MPPC Silicon Photomultiplier (SiPM) detector. The board sold soldered and tested. Recommended for usage with MicroFC 60035 silicon photomultiplier and 8x8x50 CsI(Tl) crystal. Audio ADC is compatible with popular Theremino MCA, PRA and BecqMoni2011. All you need to do is to wire the cable and to set SiPM bias voltage. Calibration is basic and very simple! Gamma Viewer MCA DIY Multi Channel Analyzer for amateur Gamma Spectroscopy. The module is assembled board based on PIC18 microcontroller. It allows to view and collect gamma spectum instantly without a computer and safe spectra on micro SD card. Display can be set for 128-1024 channels. The 10bit ADC of the microprocessor allows to measure pulse amplitude preciously, but you need to setup a compatible pulse preamplier on your PMT probe. The MCA is recommended for low count rate speed < 1000CPS MyGeiger ver.3 PRO MyGeiger ver.3 PRO DIY Geiger Counter kit is intended for enthusiasts, a physics students, teachers and researchers engages in radiation study. It fit hobby projects as well as environment or laboratory test. MyGeiger ver.3. is compatible with wide range of 400V and 500V Geiger tubes; it has flexible options for calibration that allows you to adjust your counter for different GM tubes. The kit has re-designed efficient high voltage with enlarged output power, faster microprocessor with updated and enhanced software, setup menu, USB CPM / CPS logging, faster lithium charger, reduced power consumption, power safe sleep mode and comfortable big buttons for control. Now it got the ability to operate in radiation field higher than 1500uSv/h with SBM-20 where the tube operates at the maximum possible count rate. The device has two working modes: Gamma Dose Rate Meter and Average CPS counter. In averaging mode it can be switched to work as a digital counter for an external scintillation probe as soon as the input signal from the probe fit requirements of the pulse polarity and amplitude. Electronic board of the kit comes fully soldered and tested, you only need to add your favorite GM tube and lithium battery. MyGeiger has lifetime technical support. If you want to keep your firmware version up to date then you are welcome to contact us for getting hex file update.