irfpy.cena.cena_time

CENA time module.

Module related to CENA’s time. This provides methods as follows:

• Accumulation time, or time resoultion in other word

  (accumulation_time() and identical method time_resolution().)

irfpy.cena.cena_time.accumulation_time(outfmt=None)

Return the accumulation time of CENA.

The accumulation time of CENA in seconds, i.e. 4.0.

Parameters

outfmt (None or datetime.timedelta.) – If format is in datetime.timedelta, the returned format is in datetime.timedelta.

Returns

The time of accumulation in seconds.

Return type

Float or datetime.timedelta up to outfmt parameter.

irfpy.cena.cena_time.time_resolution(outfmt=None)

An alias to the accumulation_time() function.

irfpy.cena.cena_time.dead_time(outfmt=None)

Dead time during one slot. This is constantly 25% of slot_time().

Parameters

outfmt (None or datetime.timedelta.) – If format is in datetime.timedelta, the returned format is in datetime.timedelta.

Returns

The dead time, i.e. 0.078125 in float.

>>> print('%.7f' % dead_time())
0.0078125
>>> print(dead_time(outfmt=datetime.timedelta))
0:00:00.007812

irfpy.cena.cena_time.slot_time(outfmt=None)

Time step changing the energy setting.

CENA changes energy setting every 31.25 msec. This returns the value in seconds in float or datetime.timedelta.

Parameters

outfmt (None or datetime.timedelta.) – If format is in datetime.timedelta, the returned format is in datetime.timedelta.

Returns

The slot time, i.e. 0.03125 in float.

Return type

Float or datetime.timedelta up to outfmt parameter.

irfpy.cena.cena_time.duty_time(outfmt=None)

Duty time for CENA for single energy step.

CENA duty time for each channel is \(4 \mathrm{s} \div 8 \mathrm{[energy~step]} \times 75\% = 375 \mathrm{ms}\). This returns the value in seconds in float or datetime.timedelta.

Parameters

outfmt (None or datetime.timedelta.) – If format is in datetime.timedelta, the returned format is in datetime.timedelta.

Returns

The slot time, i.e. 0.375 in float.

Return type

Float or datetime.timedelta up to outfmt parameter.

irfpy.cena.cena_time.deltaT(outfmt=None)

Time interval for CENA for single energy step.

\(4 \mathrm{s} \div 8 \mathrm{[energy~step]} = 500 \mathrm{ms}\). This returns the value in seconds in float or datetime.timedelta.

Parameters

outfmt (None or datetime.timedelta.) – If format is in datetime.timedelta, the returned format is in datetime.timedelta.

Returns

The slot time, i.e. 0.5 in float.

Return type

Float or datetime.timedelta up to outfmt parameter.