The PETRA III 40 electron bunches, 192 ns apart, were solved using the TEMPUS detector. The time resolution achieved in that experiment was limited by the sensor to 11 and 23 ns for photons of 6.4 and 14.4 keV respectively.
The single chip TEMPUS detector is being developed as a replacement to LAMBDA [4]. When running at full speed, the 16 gigabit wireline transmitter (GWT) responsible for sending the data out of the chip, will reach a total bandwidth of over 80 Gb/s. Dealing with this large amount of data is one of the main challenges ahead.
The chip was also designed to take full advantage of the through silicion vias (TSV) technology and therefore we will be able to fully remove the wirebond connections on the sides, decreasing the dead areas when placing several chips together, which is also planned for future iterations of the prototype.
With 512 x 448 pixels, 55 µm pixel size, the chip offers a larger pixel area than its predecessors, 10 times higher count rate in the the photon-counting mode and up to 40 kHz frame rate, as well as 200ps time resolution in the event-driven mode.
First results obtained at PETRA III show the capabilities of the system.
[1] X. Llopart, et al. (2022), JINST 17, C01044. [2] R. Ballabriga, et al. (2007), IEEE Trans.Nucl.Sci. 54, 1824. [3]T. Poikela, et al. (2014), JINST 9, C05013. [4]] D. Pennicard et al. (2011), JINST 6, C11009.
