DOI: 10.7910/dvn/92met3
title: Raw data for the lifetime measurement of the 5s5p 1P1 state in strontium

description: This description contains instructions for the analysis of raw data presented in the following work:&lt;br&gt;
&lt;br&gt;
Lifetime measurement of the 5s5p 1P1 state in strontium&lt;br&gt;
Ivana Puljić, Ana Cipriš, Damir Aumiler, Ticijana Ban, and Neven Šantić&lt;br&gt;
Institute of Physics, Centre for Advanced Laser Techniques, Bijenička cesta 46, 10000 Zagreb, Croatia&lt;br&gt;
Preprint available here: https://arxiv.org/abs/2501.07395&lt;br&gt;
&lt;br&gt;
For further details about the experiment setup and parameters please refer to the manuscript or contact the corresponding author. &lt;br&gt;
&lt;br&gt;
This file contains instructions for the data analysis. &lt;br&gt;
Each data point is obtained in 3 steps:&lt;br&gt;
 1. measuring the background by detuning of the laser (457 nm) - collection time P_T1&lt;br&gt;
 2. measuring the signal with the laser on the resonance (461 nm) - collection time T&lt;br&gt;
 3. again measuring the background by detuning of the laser (457 nm) - collection time P_T2&lt;br&gt;
Each collection time corresponds to the number of banks collected.&lt;br&gt;
Each bank duration is 512 seconds.&lt;br&gt;
For all measurements the power of the laser was measured at the entrance window of the cell.&lt;br&gt;
The FWHM of the laser spectrum was 1.6nm.&lt;br&gt;
Polarization of the beam was vertical for all measurements.&lt;br&gt;
&lt;br&gt;

Filenames are organized by dependance, signal and backgrounds, dates (DD_MM) and number of bank (jj), i.e: &lt;br&gt;
 - if the measurement is testing the dependance, it contains a prefix of 'power_', 'mag_field_' or 'disp_..._%IA_', where %I is the current on the dispensers&lt;br&gt;
 - independent measurements have no prefixes in the filename&lt;br&gt;
 - for the measurement of the first background: 'back1_DD_MM_bank (jj).ascii'&lt;br&gt;
 - for the measurement of the signal: 'signal_DD_MM_bank (jj).ascii'&lt;br&gt;
 - for the measurement of the second background: 'back2_DD_MM_bank (jj).ascii'&lt;br&gt;
&lt;br&gt;


8 independent measurements:&lt;br&gt;
- data was collected with the magnetic field compensated using 3 pairs of coils ( B = 0G )&lt;br&gt;
- data was collected at the dispenser current of 8.0A, which corresponds to the measured OD of 0.0011&lt;br&gt;
- data was collected on the following dates, with the following conditions:&lt;br&gt;
 1. 24.02.2024. PT_1 = 450, T = 141, P_T2 = 141, photon count rate = 2.1e4, P = 32 uw, filenames = 'back1_24_02_bank (ii). ascii','signal_24_02_bank (ii). ascii','back2_24_02_bank (ii). ascii'&lt;br&gt;
 2. 12.03.2024. PT_1 = 46, T = 106, P_T2 = 46, photon count rate = 2.1e4, P = 37 uw &lt;br&gt;
 3. 28.03.2024. PT_1 = 39, T = 106, P_T2 = 71, photon count rate = 2.2e4, P = 36 uw &lt;br&gt;
 4. 03.04.2024. PT_1 = 22, T = 106, P_T2 = 85, photon count rate = 2.2e4, P = 37 uw&lt;br&gt;
 5. 07.04.2024. PT_1 = 176, T = 268, P_T2 = 92, photon count rate = 2.2e4, P = 35 uw&lt;br&gt;
 6. 12.04.2024. PT_1 = 29, T = 106, P_T2 = 78, photon count rate = 2.2e4, P = 35 uw&lt;br&gt;
 7. 16.04.2024. PT_1 = 25, T = 106, P_T2 = 81, photon count rate = 2.1e4, P = 34 uw&lt;br&gt;
 8. 23.04.2024. PT_1 = 117, T = 162, P_T2 = 46, photon count rate = 2.3e4, P = 35 uw&lt;br&gt;
 &lt;br&gt;

Measurements of the power broadening effect:&lt;br&gt;
- data was collected with the magnetic field compensated using 3 pairs of coils ( B = 0G )&lt;br&gt;
- data was collected at the dispenser current of 8.0A, which corresponds to the measured OD of 0.0011&lt;br&gt;
- data was collected on the following dates, with the following conditions:&lt;br&gt;
 1. 29.02.2024., PT_1 = 141, T = 197, P_T2 = 457, photon count rate = 0.4e4, P = 7 uW, filenames = 'power_back1_29_02_bank (ii). ascii','power_signal_29_02_bank (ii). ascii','power_back2_29_02_bank (ii). ascii'&lt;br&gt;
 2. 05.03.2024., PT_1 = 29, T = 106, P_T2 = 50, photon count rate = 4e4, P = 68 uW&lt;br&gt;
 3. 07.03.2024., PT_1 = 106, T = 211, P_T2 = 113, photon count rate = 0.2e4, P = 3 uW&lt;br&gt;
 4. 09.03.2024., PT_1 = 43, T = 155, P_T2 = 270, photon count rate = 3.6e4, P = 66 uW &lt;br&gt;
&lt;br&gt;

Measurements of the magnetic field effect:&lt;br&gt;
- data was collected with the photon count rate of 2e4&lt;br&gt;
- data was collected at the dispenser current of 8.0A, which corresponds to the measured OD of 0.0011&lt;br&gt;
- the + (-) sign represents the magnetic field in the direction (opposite to) of the propagation of the laser beam&lt;br&gt;
- data was collected on the following dates, with the following conditions:&lt;br&gt;
 1. 13.03.2024., B = + 0.5 G, PT_1 = 113, T = 169, P_T2 = 39, photon count rate = 2e4, P = 36 uw, filenames = 'mag_field_back1_13_03_bank (ii). ascii','mag_field_signal_13_03_bank (ii). ascii','mag_field_back2_13_03_bank (ii). ascii'&lt;br&gt;
 2. 16.03.2024., B = - 1 G, PT_1 = 43, T = 162, P_T2 = 282, photon count rate = 2e4, P = 35 uw&lt;br&gt;
 3. 19.03.2024., B = - 0.5 G, PT_1 = 29, T = 162, P_T2 = 106, photon count rate = 2.1e4, P = 36 uw&lt;br&gt;
 4. 03.05.2024., B = - 0.5 G, PT_1 = 29, T = 106, P_T2 = 78, photon count rate = 2.2e4, P = 35 uw&lt;br&gt;


Measurements of radiation trapping:&lt;br&gt;
- data was collected with the magnetic field compensated using 3 pairs of coils ( B = 0G )&lt;br&gt;
- data was collected with the photon count rate of 2e4&lt;br&gt;
 1. 21.03.2024., I_dispenser = 9.5 A, OD = 0.02, PT_1 = 8, T = 15, P_T2 = 8, photon count rate = 2.4e4, P = 35 uw, filenames = 'disp_back1_95A_21_03_bank (ii). ascii','disp_signal_95A_21_03_bank (ii). ascii','disp_back2_95A_21_03_bank (ii). ascii'&lt;br&gt;
 2. 23.03.2024., I_dispenser = 7.5 A, OD = 0.0004, PT_1 = 109, T = 211, P_T2 = 102, photon count rate = 2e4, P = 36 uw&lt;br&gt;
 3. 25.03.2024., I_dispenser = 9.0 A, OD = 0.008, PT_1 = 15, T = 29, P_T2 = 15, photon count rate = 2.3e4, P = 36 uw&lt;br&gt;
 4. 26.03.2024., I_dispenser = 8.5 A, OD = 0.004, PT_1 = 15, T = 53, P_T2 = 39, photon count rate = 2.2e4, P = 36 uw&lt;br&gt;
 5. 05.04.2024., I_dispenser = 7.5 A, OD = 0.0004, PT_1 = 43, T = 71, P_T2 = 29, photon count rate = 2.1e4, P = 36 uw&lt;br&gt;
 6. 10.04.2024., I_dispenser = 8.25 A, OD = 0.002, PT_1 = 15, T = 106, P_T2 = 92, photon count rate = 2.2e4, P = 35 uw&lt;br&gt;
 7. 19.04.2024., I_dispenser = 7.75 A, OD = 0.0005, PT_1 = 141, T = 197, P_T2 = 57, photon count rate = 2.2e4, P = 35 uw&lt;br&gt;
 8. 08.05.2024., I_dispenser = 8.25 A, OD = 0.002, PT_1 = 25, T = 106, P_T2 = 81, photon count rate = 2.3e4, P = 35 uw&lt;br&gt;