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Three Lawrence Livermore National Laboratory teams are evaluating many elements and compounds in their search for new radiation detection materials. Rebecca Nikolic and her team are developing a detector made of silicon pillars and boron for capturing neutrons. etched a silicon wafer with pillars 20 micrometers high, and university collaborators used chemical vapor deposition to fill in the spaces between the pillars with boron. The prototype device had an efficiency of 20 percent, the highest efficiency reported for such a detector. And, it turns out that size matters. âWe have found that taller pillars, which provide a thicker boron layer, are more efficient at capturing neutrons,â says Nikolic. The team has recently completed a design with 50-micrometer-tall pillars to increase efficiency. [More information]
Where would we be without the bee?
The obligatory "bee on a flower" shot. Come on... we all do it.
On a chive flower... in the herb garden at home in Sussex.
One of the neat things about railroading in a giant canyon is the cool little details along the way, like this D&RGW slide detector, comprised of dozens of wires. If a rock breaks through the wires, the circuit breaks, causing a red signal. Pretty ingenious stuff, no?
Exploded View from ArnoSync Detector - See notes on picture for more details.
There are no screws used yet to hold the parts together. I use the pressing force ...
Later some part may be glued or fixed by straps.
Brookhaven National Lab invited both amateur and professional photographers to a three-hour, behind-the-scenes Photowalk of the laboratory on Saturday, Sept. 22, 2012. Participants were able to visit and photograph five major experimental facilities that are not usually accessible to the public including the Relativistic Heavy Ion Collider (RHIC) Tunnel, RHICâs STAR Detector, RHICâs PHENIX Detector, National Synchrotron Light Source, and National Synchrotron Light Source II.
BNL's Instrumentation Division, in collaboration with the NASA Marshall Space Flight Center, developed silicon drift detectors for x-ray spectroscopy, which use an array of hexagonal-shaped detectors. These detectors are the first in a generation of sensors that may be used on future space missions, in order to map surfaces of various solar bodies with x-ray fluorescence, including the moon, Mercury, asteroids, Martian satellites, and Europa, Jupiter's moon.
China metal detector schematics manufacturers & suppliers
Xiamen Chbpack Industrial Co., Ltd.
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CHBPACK Checkweigher(check weigher) & metal detector business dept
China treasure hunting metal detector manufacturers & suppliers
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CHBPACK Checkweigher(check weigher) & metal detector business dept
China metal detector hire manufacturers & suppliers
Xiamen Chbpack Industrial Co., Ltd.
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CHBPACK Checkweigher(check weigher) & metal detector business dept
This detector was removed from a building where it has was installed. The detector was reading a higher level of contamination that normal but was still within its normal operating parameters.
The accumulation of excess debris on the outside of one side of the detector indicates that it was located adjacent to an outlet from an HVAC system.
In circumstances such as this, additional maintenance precautions must be taken to ensure the operational integrity of the fire alarm system is maintained.
The Washington Monument is an obelisk on the National Mall in Washington, D.C., built to commemorate the first American president, General George Washington. The monument, made of marble, granite, and bluestone gneiss,[1] is both the world's tallest stone structure and the world's tallest obelisk, standing 555 feet 5 1â8 inches (169.294 m).[n 1] Taller monumental columns exist, but they are neither all stone nor true obelisks.[n 2] Construction of the monument began in 1848, but was halted from 1854 to 1877, and finally completed in 1884. The hiatus in construction happened because of co-option by the Know Nothing party, a lack of funds, and the intervention of the American Civil War. A difference in shading of the marble, visible approximately 150 feet (46 m) or 27% up, shows where construction was halted. Its original design was by Robert Mills, an architect of the 1840s, but his design was modified significantly when construction resumed. The cornerstone was laid on July 4, 1848; the capstone was set on December 6, 1884, and the completed monument was dedicated on February 21, 1885.[7] It officially opened October 9, 1888. Upon completion, it became the world's tallest structure, a title previously held by the Cologne Cathedral. The monument held this designation until 1889, when the Eiffel Tower was completed in Paris, France. The monument stands due east of the Reflecting Pool and the Lincoln Memorial. The monument was damaged during the Virginia earthquake of August 23, 2011 and Hurricane Irene in the same year; it remains closed to the public while the structure is assessed and repaired.[8] The National Park Service estimates the monument will be closed until 2014. Difficulties in repair include complexities such as the time needed to erect scaffolding.[9]
China surveyor metal detector manufacturers & suppliers
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China tablet metal detector manufacturers & suppliers
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I know everyone has done this before. RFID and arduino that is. But looking at the example code it looks like the antenna is always in receive mode. I am not sure how this affects the life of the chip / reader but I thought of adding a way to detect human presence before activating the receiver.
I found some little IR heat detector (here: www.allelectronics.com/make-a-store/item/IRD-10/INFRARED-... and tossed together some analog read code and viola. Now when the IR detector detects over a certain variable heat temp it activates the RFID reader.
I will post the code and write up on my blog.
If Custom Officers determine the contents to be suspicious, they conduct a detailed radiation assessment using handheld radiation detectors. This equipment enables them to determine the exact radionuclide and the location of the material. Padang Besar, Malaysia, October 2012
Photo Credit: Dean Calma / IAEA
The GTW 5936 the last GT SD40-2 in GT Blue and Red on CNs roster splits the MP 55.5 Defect detector on the old J as Mc Henry Rd in Lake Zurich, IL
China lorenz metal detector manufacturers & suppliers
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CHBPACK Checkweigher(check weigher) & metal detector business dept
China metal detector schematic manufacturers & suppliers
Xiamen Chbpack Industrial Co., Ltd.
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CHBPACK Checkweigher(check weigher) & metal detector business dept
LIFE photo, source Google/Life 2008 (Free). SCAN AND REMASTERED by Dan Beaumont. NASA INFO: GEMINI 9a "Space walk¨: On 5 June at 10:02 a.m. EST the Gemini capsule was depressurized and the hatch above Cernan opened. Cernan was out of the spacecraft at 10:19, attached by an 8 meter long tether which was connected to Gemini's oxygen supply. He had no gas maneuvering unit as was used on Gemini 4. He retrieved the micrometeorite impact detector attached to the side of the capsule and then moved about the spacecraft. He had great difficulty manuevering and maintaining orientation on the long tether. He took photographs of Gemini from the full length of the tether and finally moved to the back of the capsule where the Astronaut Maneuvering Unit (AMU) was mounted. He was scheduled to don the AMU, disconnect from the Gemini oxygen supply (although he would still be attached to the spacecraft with a longer, thinner tether) and move to 45 meters from the capsule. The task of donning the AMU took "four to five times more work than anticipated", overwhelming Cernan's environmental control system and causing his faceplate to fog up, limiting his visibility. It was also discovered that the AMU radio transmissions were garbled. These problems caused Stafford to recall Cernan to the spacecraft. He reentered the spacecraft at 12:05 p.m. and the hatch was closed at 12:10. Cernan was the third person to walk in space and his total time of 2 hours, 8 minutes was the longest spacewalk yet.
China metal detector rating manufacturers & suppliers
Xiamen Chbpack Industrial Co., Ltd.
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CHBPACK Checkweigher(check weigher) & metal detector business dept
I've included this extract from a Wireless encyclopeadia writen in the 1920's. As you can see the idea of biasing a detector diode is by no means new. Hope you find it interesting.
International inspectors may have a new tool in the form of an antineutrino detector, that could help them peer inside a working nuclear reactor. Lawrence Livermore National Laboratory and Sandia National Laboratories physicists and technologists close the water shield surrounding the antineutrino sensitive liquid scintillator in the "Tendon Gallery" of a commercial nuclear reactor. In this gallery, which is only 25 meters from the 3GW reactor core, 10^17 antineutrinos pass through the detector every second. [More information]
China metal detector sensor manufacturers & suppliers
Xiamen Chbpack Industrial Co., Ltd.
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CHBPACK Checkweigher(check weigher) & metal detector business dept
MARK II detector in the Collider Hall. Detailed views of MARK II, 10/06/1986.
Permission to cite SLAC archival material must be sought, in writing, on a case by case basis (slacarc@slac.stanford.edu). In the event that material from the SLAC Archives becomes a source for publication or a public use film or video, the Archives & History Office requests a copy of the final form.
Classroom cloud chambers provide a first-hand experience viewing particle tracks
quarknet.fnal.gov/resources/cloudchamber.shtml
Home made particle detector
www.fnal.gov/pub/inquiring/questions/homemadepdetector.html
www.scientificamerican.com/article.cfm?id=a-canteen-cloud...
Fermi National Accelerator Laboratory (Fermilab), fnal.gov/ located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics. As of January 1, 2007, Fermilab is operated by the Fermi Research Alliance, a joint venture of the University of Chicago, Illinois Institute of Technology and the Universities Research Association (URA). Fermilab is a part of the Illinois Technology and Research Corridor.
en.wikipedia.org/wiki/Fermilab
Picture taken by Michael Kappel at Fermilab
View the high resolution image on my photo website