Description
AH501D Picoammeter for High Sensitivity Bipolar Current Detection
The AH501D Picoammeter is designed to deliver precise bipolar current measurements for demanding laboratory and detector applications. Its advanced transimpedance input stage converts current signals into voltage with exceptional accuracy, while the high resolution 24 bit conversion system ensures reliable measurement of extremely small signals. This architecture allows the device to measure currents from ±2.5 nanoampere up to ±2.5 milliampere while maintaining excellent sensitivity.
The instrument achieves a resolution as fine as 300 attoampere in the most sensitive measurement range. Such precision makes the AH501D a powerful solution for experiments and monitoring systems where signal accuracy and stability are critical. The system also supports simultaneous sampling of four independent channels, allowing researchers to capture synchronized measurement data from multiple detectors or sensors.
Integrated Bias Voltage Source
The AH501D Picoammeter includes an integrated low noise bias voltage source that can supply voltages from 0 to 30 volts. This built in source is designed to support detectors that require bias potential to improve signal strength and measurement accuracy. The extremely low noise level of the bias source helps maintain a high signal to noise ratio, which is essential in sensitive current measurement environments.
The bias voltage output is available through a BNC connector and can also be configured in high impedance mode when required. This flexibility allows users to adapt the system to a wide range of detector configurations and experimental setups.
Analog Monitoring and Fast Sampling
A distinctive capability of the AH501D Picoammeter is its analog monitor outputs. These outputs allow users to observe the behavior of the measured current signal using standard laboratory instruments such as oscilloscopes or multimeters. This feature provides immediate insight into signal behavior and helps simplify diagnostic and calibration procedures.
The system also delivers fast sampling performance with a minimum sampling period of 38.4 microseconds. This corresponds to an effective sampling rate of approximately 26 kHz when using a single channel at 16 bit resolution. Such speed enables accurate monitoring of rapidly changing signals in experimental environments.
Connectivity and Beam Monitoring Applications
The AH501D Picoammeter is widely used in photon beam position monitoring systems and detector readout applications. Its simultaneous multi channel acquisition capability makes it particularly suitable for devices such as diamond detectors, ion chambers, photodiodes, and blade gap monitors.
The instrument features Ethernet connectivity that supports TCP/IP and UDP communication protocols. This allows seamless integration with laboratory networks and automated control systems. Users can configure parameters such as acquisition mode, data format, and measurement ranges remotely through software or custom applications.
An external trigger and gate input allows the picoammeter to synchronize data acquisition with external experimental events such as laser pulses or beam timing signals. Data samples can be transmitted in ASCII or RAW binary format depending on the required data transfer speed.
The device also includes dedicated oscilloscope software that enables real time monitoring, detector configuration, spectrum analysis, and data storage. This integrated software environment makes the AH501D an efficient plug and play solution for beam position monitoring and precision current measurement systems.
Technical Specifications
| Parameter | Specification |
| Device Type | 4 Channel Bipolar Picoammeter |
| Number of Channels | 4 |
| ADC Resolution | 24 bit |
| Measurement Range | ±2.5 nA to ±2.5 mA |
| Minimum Resolution | 300 aA |
| Number of Input Ranges | 3 selectable ranges |
| Sampling Period | 38.4 microseconds minimum |
| Maximum Sampling Rate | Up to 26 kHz depending on configuration |
| Bias Voltage Source | 0 to 30 V integrated low noise source |
| Analog Monitoring | Buffered analog voltage outputs |
| Data Interface | Ethernet 10/100 Mbit |
| Communication Protocol | TCP/IP and UDP |
| Trigger Input | External trigger and gate input |
| Data Format | ASCII or RAW binary |
| Software | Dedicated oscilloscope and analysis software |
| Form Factor | Compact laboratory instrument |
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