Start 00:43 22.2.25 https://elog.gsi.de/despec/G-24-00302/57
AIDA data file R9_85

Converting hexadecimal timestamp to decimal: 1740181266259754800
Assuming that this timestamp is in nanoseconds (1 billionth of a second):
GMT: Friday, February 21, 2025 11:41:06.259 PM
Your time zone: Friday, February 21, 2025 11:41:06.259 PM GMT+00:00


End 12:56 22.2.25 https://elog.gsi.de/despec/G-24-00302/85 (start of next degrader setting)
AIDA data file R9_199

Converting hexadecimal timestamp to decimal: 1740224934731157800
Assuming that this timestamp is in nanoseconds (1 billionth of a second):
GMT: Saturday, February 22, 2025 11:48:54.731 AM
Your time zone: Saturday, February 22, 2025 11:48:54.731 AM GMT+00:00

Analysis data files FEB25/R9_85 and FEB25/R9_199
 - no timewarps
 - deadtime aida05 c. 37% and 39% due to high SC41 scaler input to MACB - issue subsequently fixed 
 - deadtime aida04 c. 4%, all other FEE64s <<1%




FEE64 configuration

FEE64   a b c 
      g       h
        d e f

         a  b  c  d  e  f  g  h
DSSSD#1 15  3 12  9  1  5  2  4

n+n Ohmic FEE64s 2, 4

Data analysis assumes

- all LEC ADC data channels with valid ADC offset included (507 of 512 channels)
      LEC calibration ADC offset only

- no clustering

- no multiplex timestamp correction

- no p+n junction side - n+n Ohmic side correlation time gates

- FEE64 *not* DSSSD strip ordering

- hardware - slow comparator setting p+n junction FEE64s 100keV, n+n Ohmic FEE64s 150keV

- LEC energy difference +/- 168keV

- HEC energy difference +/- 1.68GeV

- valid LEC events

   p+n junction side multiplicity = 1 and n+n Ohmic side multiplicity = 1
   151keV < LEC energy < 1000keV
    to select candidate beta events
    standalone analysis of AIDA data, no downstream veto detector

- valid HEC events
   p+n junction side multiplicity > 0 and n+n Ohmic side multiplicity > 0
   (x,y) strips corresponding to maximum energy
   p+n junction and n+n Ohmic side HEC 

- HEC veto 
   not available - only 1x AIDA DSSSD installed

- per pixel implant-decay correlations

- end of event 
   difference in WR timestamp between successive ADC data items > 2500 and overall event length < 33us





per FEE64 LEC ADC data items 268ms/channel - attachments 3-5
- all
- 150keV < energy < 1500keV
- energy > 1500keV

absence of high instantaneous rates on spill cf. S181, S100, S505 etc
spill structure visible for energies > 1500keV - probably to be expected as majority of such events should be light ions

per FEE64 HEC ADC data items 268ms/channel - attachments 6-8

- all
- 100MeV < energy < 1000MeV
- energy > 1000MeV

Implant & decay event rates 262us/channel - attachment 9

LEC m_p versus m_n - attachment 10

LEC e_p versus e_n - 20keV/channel - attachment 11

HEC x strip versus y strip - attachment 12

- HEC-LEC implant decay time difference <1s
- HEC-LEC implant decay time difference <100s

shows x-y window used to select 82Nb events

HEC m_p versus m_n - attachment 13

HEC e_p versus e_n - 20MeV/channel - attachment 14


HEC-LEC implant-decay time difference (4ms/channel) versus - attachment 15
- HEC energy 
- LEC energy
- x & y strip 

x strips 130 & 136 disabled

HEC & LEC p strip - n strip time difference (2us/channel, offset=2000 channels) - attachment 16

HEC E (20MeV/channel) versus implant-decay time difference (4.194ms/channel) - attachment 17

LEC E (20keV/channel) versus implant-decay time difference (4.194ms/channel) - attachment 18

LEC e_p - e_n (5.6keV/channel) versus implant-decay time difference (4.194ms/channel) - attachment 19

HEC x & y strip versus implant-decay time difference (4.194ms/channel) - attachment 20

HEC-LEC implant-decay time difference (8.389ms/channel) for candidate 82Nb events - attachment 21
- blue - forward
- cyan - backward

Note
- no FRS PID
- no HEC dE
- no HEC veto
- no HEC energy gates - assume all events within x-y window *stop* in AIDA DSSSD - 82Nb events known to overlap in x-y with (longer-lived, more numerous) 83Nb events
- no front-back time difference
- no clustering
- *all* LEC channels with valid ADC offsets (507 of 512) included *except* 2x strips 130 & 136

HEC-LEC implant-decay time difference (8.389ms/channel) for candidate 82Nb events - attachment 22

Weighted least squares fit channels 1-12 half life 55(9)ms cf. NNDC 50.0(3)ms.