TODO

See also:

https://wiki.fe.infn.it/besiii/index.php/Data_decode_TODO

https://wiki.fe.infn.it/besiii/index.php/GUFI_TODO

List of bug and problems

• The radius used on the L2 do not correspond to the real one

• µTPC disabled up to now

• Only 33% of the hits has a cluster on both sides of the L2, while in principle it should be 100% --> problem due to ROC?

• FEB from 0 to 15 are noisy at channel 62

• Peaking background on FEB=6 && channel = 62

Possible solutions to be confirmed

The charge measured with random trigger is above 10fC, up to 50 fC

This is due to few channels with very high noise:

• FEB_label = 21, chip 2, channel 3
• FEB_label = 23, chip 1, channel 26
• FEB_label = 36, chip 2, channel 3
• FEB_label = 43, chip 2, channel 45

3/4 of these channels (ch. 3 and 45) are located on the edge of the anode-FEB connector (see L2_FEB_pinout).

TO-DO:

• Check and confirm that removing these channels the very high charge noise disappears (for all runs)
• Check the FEB-anode connection
• Check the position of these FEBs --> are they close to some potential noise source?

Solved

• Charge decrease as the threshold increases -> due to some error in setting the threshold. Now if the thr_sigma*n_sigma < 1, threshold is increased by 1.

• The reconstruction is too slow with event.C -> lSolved by changing the arrays to vectors.

No signal from FEB 2 and 30

This is due to missing calibration files (raw data should be present):

• FEB 30 (calibration files available) has been restored
• FEB 2 (calibration files not available) will be provided soon with a temporary mock-up calibration (based on TP scan performed with GUFI)