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ORTEC As early as1970s Just startNmanufacturing field of high-purity germanium, and in1990sUse4aNType crystal of high-purity germanium producedTETRADdetector.ORTEC TETRAD Detectors can provide high efficiency over a wide energy range and in a limited space. nowORTECcontinued to remain inNhigh-purity germanium detector manufacturing technology, and provides standard modelsTETRADDetectors, aiming to provide better products for nuclear physics applications.
Individual discrete detector crystals with edges cut away allow for tighter packaging and smaller space
The crystal of each high-purity germanium detector uses a coaxial geometry, with two sides of the germanium crystal90degree angle, and the remaining longitudinal surfaces are connected to both sides by arcs. The four detectors are tightly packed together to form a "four-leaf clover shape" and installed in an end cap. cold finger passed5LIt is refrigerated with liquid nitrogen in a Dewar tank, and the refrigeration maintenance time is about12hours.
ORTEC TETRAD used by detectorsNType high purity germanium crystal mainly provides2an advantage. First,NType materials reduce the damage to detectors caused by neutrons and protons that are common in nuclear physics experiments; secondly, photons may be scattered multiple times before exhausting their energy within the crystal. Depending on the energy, a photon's energy may be deposited in one detector and then scattered to other detectors, depositing the remaining energy. In order to measure this part of energy and ensure peak energy collection,ORTECofNThe outer surface of the detector uses a very thin contact electrode to maximize the passing efficiency of incident or scattered photons, especially low-energy photons.
The four detectors can independently collect energy information, and the problem of scattered photons is handled through a "add-back" algorithm. The "add back" algorithm can makeTETRAD The total system efficiency of the detector is much greater than the sum of the four individual crystals.
Additionally, four smaller crystals and separate preamplifiers allow the system to achieve higher count rates and better resolution than larger detectors.
Typical applications
Scientific research institutions/universities
ORTEC TETRAD Detectors are widely used in nuclear physics research, especially in applications where energy resolution and relative efficiency are required in confined spaces.ORTEC TETRADTwo typical applications of detectors:
Performance
See the product data sheet for specific parameters. Guaranteed values are measured by ORTEC analog or digital electronics.
ORTEC TETRAD The detector is rugged and has a long service life. Currently TETRAD The design further improves the convenience of after-sales maintenance, allowing some simple technical problems to be solved on site, eliminating the complex steps of returning to the factory for repairs. In addition,TETRAD The high-purity germanium crystal in the detector can be disassembled and maintained independently without the need to disassemble the entire assembly.
Individual discrete detector crystals with edges cut away allow for tighter packaging and smaller space
| indicator | Advantages |
| • Thin contact electrodes are used on the front and side surfaces (Detectable energy range20 keV–10 MeVof gamma rays ) , the detectors are closely spaced (Spacing approx.1.5 mm) Minimizes dead layers。 | • Counting efficiency in limited space |
| • Using coaxial geometriesNtype crystal | • Short molding time and high energy resolution |
| • Nhigh purity germanium material | • Good resistance to neutrons and protons • Good annealing ability to restore performance if damage occurs |
| • 5liter dewar( Liquid nitrogen can be maintained for up to12 hours) | • All directions — Allows detectors to be installed in any orientation |
| • Rugged and reliable design | • Detector performance and lifespan are more reliable • Vacuum integrity is similar to conventional detectors |
| • independently controllable4put before | • Allows individual optimization of each detector and improves overall system performance |
The crystal of each high-purity germanium detector uses a coaxial geometry, with two sides of the germanium crystal90degree angle, and the remaining longitudinal surfaces are connected to both sides by arcs. The four detectors are tightly packed together to form a "four-leaf clover shape" and installed in an end cap. cold finger passed5LIt is refrigerated with liquid nitrogen in a Dewar tank, and the refrigeration maintenance time is about12hours.
ORTEC TETRAD used by detectorsNType high purity germanium crystal mainly provides2an advantage. First,NType materials reduce the damage to detectors caused by neutrons and protons that are common in nuclear physics experiments; secondly, photons may be scattered multiple times before exhausting their energy within the crystal. Depending on the energy, a photon's energy may be deposited in one detector and then scattered to other detectors, depositing the remaining energy. In order to measure this part of energy and ensure peak energy collection,ORTECofNThe outer surface of the detector uses a very thin contact electrode to maximize the passing efficiency of incident or scattered photons, especially low-energy photons.
The four detectors can independently collect energy information, and the problem of scattered photons is handled through a "add-back" algorithm. The "add back" algorithm can makeTETRAD The total system efficiency of the detector is much greater than the sum of the four individual crystals.
Additionally, four smaller crystals and separate preamplifiers allow the system to achieve higher count rates and better resolution than larger detectors.
Typical applications
Scientific research institutions/universities
ORTEC TETRAD Detectors are widely used in nuclear physics research, especially in applications where energy resolution and relative efficiency are required in confined spaces.ORTEC TETRADTwo typical applications of detectors:
- Beam experiments related to nuclear reaction cross-section measurement and nuclear structure analysis
- Fission product analysis of irradiated materials (branch ratio)
Performance
See the product data sheet for specific parameters. Guaranteed values are measured by ORTEC analog or digital electronics.
ORTEC TETRAD The detector is rugged and has a long service life. Currently TETRAD The design further improves the convenience of after-sales maintenance, allowing some simple technical problems to be solved on site, eliminating the complex steps of returning to the factory for repairs. In addition,TETRAD The high-purity germanium crystal in the detector can be disassembled and maintained independently without the need to disassemble the entire assembly.
