150AVP Photomultiplier Tube

The 150AVP is a ten-stage photomultiplier tube designed for light detection and amplification applications. It features a duodecal base and a useful photocathode diameter of at least 32 mm. The device is closely associated with the XP1010 designation.

Design and Construction

The 150AVP is constructed with a 10-stage multiplier structure to achieve high gain. It utilizes a standard duodecal base for electrical connections. The physical design provides a minimum useful photocathode diameter of 32 mm, ensuring an adequate active area for intercepting incident luminous flux.

Photoelectric and Sensitivity Characteristics

The photocathode of the 150AVP is sensitive to light in the ultraviolet and visible spectrum, exhibiting a maximum spectral response at 4200 Angstroms.

The tube's sensitivity parameters are characterized at both the photocathode and the anode:

• Photocathode Sensitivity: The minimum photocathode sensitivity is 25 microamperes per lumen (\u00b5A/lm), with an average value of 50 \u00b5A/lm.
• Anode Sensitivity: At a supply voltage of 1800 V, the minimum anode sensitivity is 60 A/lm, while the average anode sensitivity reaches 300 A/lm.

Electrical Ratings and Linearity

The 150AVP operates under specified electrical limits and conditions to ensure reliable performance and prevent damage to the anode structure:

• Supply Voltage: The nominal supply voltage for the specified sensitivity ratings is 1800 V.
• Maximum Direct Dark Current: The maximum direct dark current is rated at 50 nA when measured at an anode sensitivity of 60 A/lm.
• Maximum Anode Dissipation: The anode is rated for a maximum power dissipation of 0.5 W.

Linearity Limits

The linearity of the ratio between the incident luminous flux and the resulting anode current depends on the chosen voltage distribution network. The tube supports two distinct operating configurations:

• Voltage Distribution A: The luminous flux to anode current ratio remains linear up to an anode current of 30 mA.
• Voltage Distribution B: The linearity extends up to an anode current of 100 mA.

These distribution-specific limits require reference to the corresponding instructions for use to configure the dynode voltage divider correctly.