The Harshaw 3500 TLD Reader provides cost-effective measurements of the radiation dose absorbed by individual TLD elements: ribbon (chips), rods, micro-cubes or powders.
Product Detail
lIntroduction
The Harshaw 3500 operates on WinREMS Software, which runs under Windows® on a separate computer, providing user interface while the reader control and the applications software. The instrument includes a sample drawer for a single element TLD dosimeter, a linear, programmable heating system and a cooled photomultiplier tube with associated electronics to measure the TL light output. The manually operated Harshaw 3500 finds applications in medical physics and dosimetry laboratories.
Harshaw 3500 Key Features
Planchet heating incorporates welded thermocouple for best temperature reproducibility
Heating profile includes pre-heat and post-read anneal cycles, with editing
Heating temperature capability up to 600°C
7 decade glowcurve acquisition range
Thermoelectric PMT cooler for maximum gain stability
Measurement quality assurance
Automatic background subtraction capability
Easy to operate, service and maintain
Compact and attractive (320 mm wide x 290 mm deep x 290 mm high)
Optional calibration software
Optional neutral density filter to extend the high measurement range
Advantages of a Separate Computer
Minimum initial investment
Extremely flexible parametric adjustments, implemented in software
The computer can be used for other purposes when not required for TLD
Use of commercial software for data manipulation, report generation and storage
Applications
Radiotherapy planning verification
Total Body Irradiation dose verification
Skin irradiation dose verification
Stereotactic beam output factor measurement
Critical organ dose verification
Diagnostic dose studies
CT dose measurement for quality assurance
Environmental dosimetry
Testing for irradiated food
Radioactive dating
Available Dosimeters
Recessed planchets for chip sizes 3.2mm x 3.2mm, 6.4mm x 6.4mm, 15.7mm round
Chip and Rod planchet 3.2mm x 3.2mm chip and 6mm rod, 1mm dia. or 1mm sq.
Accessories
Personal Computer
Printer
N2 gas flowmeter
2210 Tabletop Irradiator
Low temp annealing oven
High temp annealing oven
Programmable annealing oven
Uninterruptable power supply
Vacuum tweezers
Dosimeter storage tray
Stainless steel annealing tray assembly
Stainless steel annealing tray
STANDARD FUNCTIONS PERFORMED BY WinREMS SOFTWARE Graphical user interface
Pull-down menus
Selection via mouse
TL data acquisition parameter selections
Application of Reader Calibration Factor, (RCF), and Element Correction Coefficient, (ECC)
Automatic background subtraction
Application of quality factor
Raw data and glowcurve printing during acquisition
ASCII export file generation
Periodic PMT testing of noise and response to test light
Alarm and stop if TL data exceeds preset limit
Re-read TLD if TL data exceeds preset limit
TLD heating profile setup
Selection of pre-defined Time/Temperature Profiles (TTPs)
Editing of: TTP titles, Region of Interest (ROI) limits, Calibration region, Preheat temperature and time, Maximum read temperature, Temperature ramp rate, Anneal temperature and time, Acquisition time
TL data acquisition
Acquisition of glowcurve
Acquisition of temperature profile
TL data presentation and storage
Reading parameters
Date and time of reading
Dosimeter identification
Graphically presented glowcurve and TTP
Integrals of up to four regions of interest
Applicable RCF and ECC
Background value for subtraction
Values of test light and PMT dark current readings
Software options
Dosimeter calibration software
Glowcurve deconvolution
Computer requirements (minimum)
Pentium 166 MHz with 32 MB RAM; 40 MB free disk space; CDROM drive SVGA color monitor (800 x 600), keyboard and mouse. Windows™ 98, 2000, XP or NT 4.x One RS232 serial port for connection to Model 3500 and one parallel port for printer.
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