VA1 Chips

IDEAS is the company in Oslo, Norway that provides the VA1 chips.

Original 1.2 um VA1 Chip

• VA1 documenation from IDEAS.

• BELLE Note Radiation Hardness of the VA1 as measured by Yokoyama and Tajima of the University of Tokyo.

Radiation Tolerant Versions of the VA1

• VA1 documentation on the 0.35 um version of the VA1 from IDEAS.

• "A Radiation Tolerant Version of the VA1," [ppt] [pdf]
  Front Electronics 2000 Conference; Perugia, Italy; May 16, 2000.

Single Event Upset Effects

• Ljubljana group web page on SEU and SELU effects.

The VA1TA

• Test data on shaping time from IDEAS (last update Jan. 6, 2002). VADAQ plots of raw pulse shapes (Jan. 4, 2002). Note: the VADAQ timescale may not be properly calibrated. This will be checked later.

• Initial specification from Belle.

• Preliminary documentation on the VA1TA from IDEAS.

• Test report (V5) (3.5 MB pdf) from IDEAS (last update July 25, 2001).

• Test results from U. Tokyo (Nakadaira, Oct. 18, 2001)

The VADAQ System

• VADAQ Description.
• VADAQ User Manual.
• VA DAQ V1.2.
• Front end pin assignments..