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Summary of Contents for ORTEC 460
- Page 1 Model 460 Delay Line Amplifier Operating and Service Manual ® Printed in U.S.A. ORTEC Part No. 733320 1202 Manual Revision C...
- Page 2 In the event ORTEC fails to manufacture or deliver items called for in this agreement or purchase order, ORTEC’s exclusive liability and buyer’s exclusive remedy shall be release...
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Page 3: Table Of Contents
CONTENTS WARRANTY ............... ii SAFETY INSTRUCTIONS AND SYMBOLS . -
Page 4: Safety Instructions And Symbols
SAFETY INSTRUCTIONS AND SYMBOLS This manual contains up to three levels of safety instructions that must be observed in order to avoid personal injury and/or damage to equipment or other property. These are: DANGER Indicates a hazard that could result in death or serious bodily harm if the safety instruction is not observed. -
Page 5: Safety Warnings And Cleaning Instructions
SAFETY WARNINGS AND CLEANING INSTRUCTIONS DANGER Opening the cover of this instrument is likely to expose dangerous voltages. Disconnect the instrument from all voltage sources while it is being opened. WARNING Using this instrument in a manner not specified by the manufacturer may impair the protection provided by the instrument. -
Page 7: Description
1.1. GENERAL preamplifier output signal (usually 50 to 500 causes an undershoot whose peak amplitude is The ORTEC 460 Delay Line Amplifier is a nuclear roughly pulse amplifier that provides delay-line shaping for all output pulses. It accepts input pulses of either... -
Page 8: Specifications
The pole-zero adjust is accessible from the front panel of the 460 and can easily be adjusted by observing the baseline with an oscilloscope while a monoenergetic source or... -
Page 9: Installation
Power Supply and is intended for rack mounting; therefore if vacuum tube equipment is operated in the same rack with the 460, there must The preamplifier output signal is connected to the be sufficient cooling by circulating air to prevent... -
Page 10: Connection Of Test Pulse Generator
ORTEC 419 or equivalent depends primarily on two considerations: the The rise time of the output pulses from the 460 will preamplifier must be properly connected to the 460 be a function of the rise time furnished from the as discussed in Section 3.2, and the proper input... -
Page 11: Selection Of Prompt Or Delayed Output
The 460 provides both unipolar and bipolar outputs. receiving end to 50% of that which is available in The unipolar output should be used in applications the sending instrument. -
Page 12: Operating Instructions
4. OPERATING INSTRUCTIONS 4.1. INITIAL TESTING AND OBSERVATION 4.2. FRONT PANEL CONTROLS OF PULSE WAVEFORMS GAIN A coarse-gain switch and a fine-gain potentiometer select the gain factor. The gain is Refer to Section 6 for information on testing read directly; switch positions are 10, 20, 50, 100, performance and observing waveforms at front 200, 500, and 1000, and continuous fine-gain range panel test points. -
Page 13: Operation With Semiconductor Detectors
Figure 4.3 shows the amplifier noise generated by 5. Turn on the Pulser, and use the Normalize the 460. It is a function of both the integrating time potentiometer and attenuators to set the output due constant and of the gain setting. The portion of the to the pulser for the same pulse height as the pulse curves between a gain of 3.3 and a gain of 10... - Page 14 Fig. 4.3. Noise as a Function of Gain and Integrating Time Constant in the ORTEC 1. Select the energy of interest with an ORTEC 419 Pulse Generator, and set the Amplifier and Biased 460 Delay Line Amplifier.
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Page 15: Operation In Neutron-Gamma Discrimination System With Stilbene And Liquid Scintillators
428 The single-delay-line shaped output pulses from the Detector Bias Supply. ORTEC 460 are suited ideally to the input requirements of the ORTEC 458 Pulse Shape Discriminator. When these instruments are... - Page 16 0.8 and 0.9. The ORTEC 458 was designed to take Three parameters determine the ability to advantage of the optimum trigger point.
- Page 17 For the gamma ray Proper Application of the 458 and 460 The 458 Pulse Shape Analyzer measures the 90-10% fall time of the linear signal presented to its input. To obtain the best time resolution use the fast unipolar delay-line-shaped output from the 460. The rise...
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Page 18: Neutron-Gamma-Ray Discrimination In Proportional Counters
This is illustrated in Fig. 4.12. The suggested block diagram for the proportional counter system for neutron-gamma discrimination is shown in Fig. 4.13. The 460 delay-line-shaped amplifier should have a 2- s shaped line for optimum performance. The Lower Level control of the window should be set just below the peak corresponding to the neutron rise time (see Fig. -
Page 19: Other Experiments
Rise Time Spectrum from a Proton Recoil Proportional Counter. 4.8. OTHER EXPERIMENTS Block diagrams illustrating how the 460 and other ORTEC 400 Series module can be used in experimental setups are given in Figs. 4.14-4.17. Fig. 4.14. Gamma-Gamma Coincidence Experiment. - Page 20 Fig. 4.15. Gamma-Ray Charged-Particle Coincidence Experiment. Fig. 4.16. Gamma-Ray Pair Spectrometer.
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Page 21: References
Fig. 4.17. General System Arrangement for Gating Control. 4.9. REFERENCES... -
Page 22: Circuit Description
5. CIRCUIT DESCRIPTION Figure 5.1 is a block diagram for the ORTEC 460 The Q7 output is delay-line-shaped by DL1 and Delay Line Amplifier. In this diagram the circuits are pole-zero-cancelled by R28 and applied to A2, 08 divided into 7 functional groups, and the transistors through Q15. - Page 23 A Fine Gain control, R60, is used between A2 and through the front panel connector is less than 1 A3 as a continuously variable attenuator with a It is isolated from the front panel test point by R209. range of 0.3 through 1. A selectable Integration The signal also passes through series resistor R210 time constant uses switch S4, resistors R84 and for the 93...
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Page 24: Maintenance
Integ Time Constant 0.04 Delay 1. Connect a positive pulser to the 460 as shown in Fig. 6.1 and adjust the pulser to obtain 10 V at the 460 Unipolar Output. This should require an input pulse of 10 mV. The Bipolar Output should also be 10 V. - Page 25 Nonlinearity. Adj control depends upon the characteristics of the input pulses that are furnished from the preamplifier during normal operation of the 460. Observe the Output Loading With the same setup as in amplifier unipolar output for a high gain setting (50 or more) that will provide 8- to 10-V pulses for a "Linearity"...
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Page 26: Troubleshooting
Cs source and the delayed mixed output is fed to an ORTEC 442 Fig. 6.4. Circuit Used to Measure Crossover Linear Gate. A 421 Integral Discriminator and a 416... -
Page 27: Tabulated Test Point Voltages On Etched Board
If the 460 is suspected of malfunctioning, it is essential to verify such malfunctioning in terms of simple pulse generator impulses at the input. The 460 must be disconnected from its position in any system, and routine diagnostic analysis performed with a test pulse generator and oscilloscope. - Page 28 *16 +12 V Coaxial 1 2 V Coaxial Spare bus Coaxial Reserved bus *41 117 V ac (neutral) Spare *42 High-quality ground Spare Ground guide pin Reserved Pins marked (*) are installed and wired in ORTEC’s 4001A and 4001C Modular System Bins.
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