产品介绍
该产品主要用来提供不同强度的γ射线（单源或者双源），做关于核辐射的相关生物学研究。整个辐照系统分为储源室和照射室。储源室主要储存辐射源，利用气压驱动，实现辐射源高度的调节，从而控制辐射的强度。照射室中的载物台利用双轴定位轨道可以在一定范围内水平和垂直调节，还可以匀速旋转。为了保证实验和使用者的安全，设备共有两层屏蔽层，一层是在包围辐射源，一层包围照射室及储源室。BX3-BR生物学辐照仪设备中设有紧急停止按钮和安全联锁装置，防止意外事故的发生。
大规格的照射室和可变距离的辐射源为辐射项目研究提供了最合适方案
辐射源：铯Cs-137 2200 Ci 11 to 35 cGy/min
1200 Ci 6 to 19 cGy/min
450 Ci 2 to 7 cGy/min
总体尺寸：820mm wide x 590mm deep x 2000mm tall
试验箱尺寸：805mm x 440mm x 650mm tall
重量：3190kg
调节距离：水平调节距离500mm-800mm
垂直调节距离±250mm
BX3-BR生物学辐照仪
The Model BX3-BR Gamma Irradiator produces a beam of gamma radiation of varying strengths
for irradiating biological specimens inside a fully shielded enclosure. The large exposure chamber
and variable distance to the radiation source offers the most flexibility for research and irradiation
projects.
EXPOSURE CHAMBER
A shielded enclosure provides an exposure
chamber for irradiating biological specimens
to predefined exposure rates. The chamber is
805mm wide x 440mm deep x 650mm tall.
A positioning track provides variable distances
from the source that range from
500mm to 900mm. The track also allows
vertical adjustment.A200mm diameter turntable
rotates the test material at 10 RPM. Two
vent/cable holes, curved to prevent radiation
shine, allow fresh air and/or cables to enter
the chamber. A front door provides full access
to the chamber.
SOURCES
A range of Cesium-137 source strengths is
available to provide different exposure rates.
Exposure Rate @
Cs-137 Source Size Center of Chamber
2200 Ci 11 to 35 cGy/min
1200 Ci 6 to 19 cGy/min
450 Ci 2 to 7 cGy/min
The sources are doubly encapsulated, hermetically sealed, special
form sources. The source capsule is fabricated of stainless steel. A tungsten rod holds the
source and is raised to the side of the exposure chamber during exposure.When it is lowered to the storage position by pneumatic
cylinder, exposure rates in the exposure chamber are minimized. Dose uniformity is +/- 10%.
SHIELDING
The irradiator consists of 2 shields, one for storing the radiation source, and the second for housing the exposure chamber.
The exposure chamber door is stepped to eliminate radiation shine. Lead provides sufficient shielding to limit radiation level
to ≤ 5 μSv/hr (0.5 mR/h) at 30cm from the surface of the shield. All lead is totally encased in steel.
SAFETY INTERLOCK SYSTEM
The safety interlock system assures the source cannot be exposed if all interlocks are not satisfied. During an exposure the
door is locked closed. Status lights show the exposure status at all times. An emergency off button when pressed will terminate
an exposure and stop all motion of the positioning track. If power or air is lost the system reverts to a safe condition.
Model BX3-BR Gamma Irradiator
Hopewell Designs, Inc.
MODEL BX3-BR GAMMA IRRADIATOR
CONTROL SYSTEM
The control panel has a timer, an expose and return switch,
and a keyed power switch. The operator interface is an LCD
display and keypad with function keys. Time is entered via
keypad. Preset and elapsed time are displayed. The turntable
can be turned on or off. The positioning track can be moved
horizontally and vertically.
When the expose button is pressed, and all interlock circuits
are satisfied, the source is raised to the exposed position via
pneumatic cylinder and the turntable begins to rotate. A position
sensor confirms source position. When the timer expires
or the return button is pressed, the source returns to the
storage position and the turntable stops rotating.
OPTIONAL COMPUTER CONTROL
A computer control system is available to automate many
features of the BX3-BR. Exposure rate is calculated for
turntable position. The positioning track automatically moves
to position when a distance is entered. One-button setup allows
pre-defined exposure protocols to be quickly configured.
Calibration of the radiation fields is automated to
simplify the irradiator calibration.
SPECIFICATIONS
Physical Size:
820mm wide x 590mm deep x 2000mm tall
(72 in. x 23 in. x 79 in.)
Test Chamber Size:
805mm x 440mm x 650mm tall
(32 in. x 17 in. x 24 in.)
Weight: 3,190 kg (7,000 lbs)
Floor Loading: 3,140 kg/m2 (640 Lbs/SqFt)
Available Cs-137 Source Sizes: 450, 1200, 2200 Ci
Distance: Source to center of turntable: Adjustable from
500mm to 900mm
Vertical height of turntable can be adjusted from beam
centerline to –225mm
Dose Rates (cGy/min): from 11 to 35 for 2,200 Ci
from 6 to 19 for 1,200 Ci
from 2 to 7 for 450 Ci
ACCESSORIES
Attenuator Set: A set of three attenuators (X2, X4,
X10) can be used singly or in combination to provide
attenuation up to X800.
Jigs and Fixtures: Fixtures are available for a variety of
sample holders such as cell cultures and flasks. Cages for
small animals are also available.
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