Report on HD Gas Analysis by Raman Spectroscopy Technique

Summary Report on HD gas analysis by Raman spectroscopy technique - June- September - November 2015.

Check measurements – November 2016

-Introduction.

Seven bottles of HD gas were sent to Rome from JLab. They were received May 2015.

The seven bottles contained HD gas as follows:

1. JMU 6.1 tank #6 filled 1/21/15

2. JMU 5.1tank #1 filled 1/22/15

3. JMU 6.1tank #19 filled 1/23/15

4. JMU 6.1 tank #31 filled 2/4/15

5. JMU 6.1 tank #4 filled 2/5/15

6. JMU 6.0 uva tank #9 filled 2/7/15

7. JMU 2reference tank filled 1/15/2013

The Laser was serviced early 2015; the final power available on the green line was 12 W. The power slowly reduced to 9W. The average counting rate available at the highest HD peaks was typically higher than 2000 counts/s. More data were taken one year later in October 2016 with a Laser power of 8W. The power is down at 6W in March 2017.

We took a first set of measurements on June 6-8 2015 and July 14-20 2015. A second set of measurements was taken from September 15th to September 17thfor double check. A third set of measurements was taken on November 19-25 2015. Each spectrum is analyzed in two different methods to extract the peaks content (using either the integral under the Gaussian function or the sum of histogram counts after the background subtraction): we have a total of 4 quasi-independent determinations of the relative gas concentrations.

The analysis program was revised to better take into account the noise level and thefinal error was evaluated taking into account the correlation among the results (following g14 data analysis 2 based procedure). All the 2015 data have been re-analyzed and were the subject of Martina Laurenza undergraduate thesis.

To better understand the results a final set of data has been take on October 19-21 2016.

JMU6.1 tank # 6

Measurements list:

June8th high noise at high wave-lenghts (neon on?)

September 15thsome air is present

November 25thair is still present

October 19th 2016some air present – high recombination

a. 15/6/8JMU-6.1tank#6 HD gas was used to fill the Raman cell and we took a Raman spectrum on June8th 2015lasting 1hour. The maximum count rate on the highest peak was increased to more than 2000 counts/s.

jmu6-1 tank 6 15_6_8 - neon - 2434 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00065 / 0,00002 / 0,00062 / 0,00004
ref-ga+b / 0,00068 / 0,00003 / 0,00066 / 0,00007
fit-int-back / 0,00068 / 0,00003 / 0,00065 / 0,00005
ref-int-back / 0,00068 / 0,00003 / 0,00066 / 0,00007
mean / 0,00066 / 0,00002 / 0,00064 / 0,00003

Figure 1. JMU6-1 tank 6 Raman analysis results of June8tha) spectrum b) analysis results. Both H2 and D2 lines are at the low.

Figure 1 shows the spectrum and the Table of results from the 4 quasi-independent analyses. H2 and D2 concentrations are very similar.The final results are:

H2/HD = ( 0,000660,00002)

D2/HD = ( 0,000640,00003)

b. 15/9/15The cell was filled and measured againfor 1 hour on September15th. Some air is present in the cell but it does not prevent to extract the D2 content of the first peak.

jmu6-1 tank 6 15_9_15 - air - 1194 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00093 / 0,00005 / 0,00107 / 0,00009
ref-ga+b / 0,00096 / 0,00006 / 0,00080 / 0,00010
fit-int-back / 0,00093 / 0,00006 / 0,00110 / 0,00010
ref-int-back / 0,00095 / 0,00006 / 0,00080 / 0,00010
mean / 0,00094 / 0,00006 / 0,00095 / 0,00008

Figure 2. JMU6-1 tank 6 Raman analysis results of September15th a) spectrum b) analysis results. H2 and D2concentrations are higher than in June.

Figure 2 shows the spectrum and the Table of results. H2 and D2 concentrations increased. The final results are:

H2/HD = ( 0,000960,00006)

D2/HD = ( 0,000950,00008)

c. 15/11/25The cell was filled and measured again for 1 hour on November 18th. Some air is still present in the cell.

jmu6-1 tank 6 15_11_25 - air - 881 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00199 / 0,00007 / 0,00190 / 0,00010
ref-ga+b / 0,00201 / 0,00007 / 0,00190 / 0,00020
fit-int-back / 0,00202 / 0,00009 / 0,00200 / 0,00020
ref-int-back / 0,00201 / 0,00009 / 0,00190 / 0,00020
mean / 0,00201 / 0,00008 / 0,00191 / 0,00008

Figure 3. JMU6-1 tank 6 Raman analysis results of November 25th a) spectrum b) analysis results. H2 and D2 concentrations keep incresing.

Figure 3 shows the spectrum and the Table of results. H2 and D2 concentrations increased. The final results are:

H2/HD = ( 0,002010,00008)

D2/HD = ( 0,001910,00008)

d. 16/10/19The cell was filled and measured again for 1 hour on October 19th2016. Some air is still present in the cell.

jmu6-1 tank 6 16_10_19 - air - 378 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,02320 / 0,00020 / 0,02480 / 0,00040
ref-ga+b / 0,02320 / 0,00020 / 0,02540 / 0,00050
fit-int-back / 0,02300 / 0,00100 / 0,02500 / 0,00200
ref-int-back / 0,02260 / 0,00020 / 0,02480 / 0,00060
mean / 0,02300 / 0,00020 / 0,02500 / 0,00030

Figure 4. JMU6-1 tank 6 Raman analysis results of October 19th a) spectrum b) analysis results. H2 and D2 concentrations are one order of magnitude higher.

Figure 4 shows the spectrum and the Table of results. H2 and D2 concentrations increased. The final results are:

H2/HD = ( 0,023000,00020)

D2/HD = (0,024000,00030)

JMU6.1 tank # 1

Measurements list:

June 9th some air is present

September 15thgood spectrum

November 19thgood spectrum

a. 15/6/9 JMU-6.1 tank#1 HD gas was used to fill the Raman cell. The spectrum contained some air and lasted one hour. Both H2 and D2 gas are present at the same level of 1x10-3.The maximum counts is again higher than 2000 counts/s

jmu6-1 tank 1 15_6_9 - 2250 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00106 / 0,00003 / 0,00111 / 0,00005
ref-ga+b / 0,00108 / 0,00003 / 0,00112 / 0,00008
fit-int-back / 0,00106 / 0,00003 / 0,00111 / 0,00006
ref-int-back / 0,00107 / 0,00003 / 0,00110 / 0,00008
mean / 0,00107 / 0,00003 / 0,00111 / 0,00006

Figure 5. JMU6.1 tank 1 Raman analysis results of June19th a) spectrum b) analysis results. H2 and D2 concentrations are the same, in the 1x10-3 range.

Figure 5 shows the spectrum and the Table of results. The final results are:

H2/HD = ( 0,001070,00002)

D2/HD = ( 0,001110,00006).

b. 15/9/15 JMU-6.1 tank#1 HD gas was used to refill the Raman cell and to take a second spectrum for one hour. The spectrum contains no air and has a nice shaped background. Both H2 and D2 gas are present at the same level of 1.4x10-3. Recombination occurred!

jmu6-1 tank 1 15_9_15 - 1390 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00143 / 0,00004 / 0,00133 / 0,00008
ref-ga+b / 0,00145 / 0,00005 / 0,00140 / 0,00010
fit-int-back / 0,00142 / 0,00006 / 0,00134 / 0,00010
ref-int-back / 0,00143 / 0,00005 / 0,00134 / 0,00010
mean / 0,00143 / 0,00005 / 0,00135 / 0,00005

Figure 6. JMU6.1 tank 1 Raman analysis results of September 15th a) spectrum b) analysis results. H2 and D2 concentrations are the same, in the 1.4x10-3 range.

Figure 6 shows the spectrum and the Table of results. The final results are:

H2/HD = ( 0,001430,00005)

D2/HD = ( 0,001350,00005).

c. 15/11/19 JMU-6.1 tank#1 HD gas was used to refill the Raman cell and to take a third spectrum for one hour. The spectrum contains no air and has a nice shaped background. Both H2 and D2 gas are present at slightly different levels. Recombination is still evident.

jmu6-1 tank 1 15_11_19 - 1279 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00186 / 0,00005 / 0,00140 / 0,00009
ref-ga+b / 0,00190 / 0,00005 / 0,00150 / 0,00010
fit-int-back / 0,00188 / 0,00005 / 0,00140 / 0,00010
ref-int-back / 0,00190 / 0,00006 / 0,00150 / 0,00010
mean / 0,00188 / 0,00005 / 0,00145 / 0,00005

Figure 7. JMU6.1 tank 1 Raman analysis results of November 19th a) spectrum b) analysis results. H2 and D2 concentrations are slightly different, in the 1.5x10-3 range.

Figure 7 shows the spectrum and the Table of results. The final results are:

H2/HD = ( 0,001880,00005)

D2/HD = ( 0,001450,00005).

JMU6.1 tank # 19

Measurements list:

June 10th some air is present

September 16thair present

November 19th air present

October 20th 2016

a. 15/6/10 JMU-6.1 tank#19 HD gas was used to fill the Raman cell on June10th. Gas is contaminated by air. There is lower D2 content at the level of 8 10-4. H2 is slightly higher.

jmu6-1 tank 19 15_6_10 - 2109 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00128 / 0,00003 / 0,00089 / 0,00005
ref-ga+b / 0,00129 / 0,00003 / 0,00074 / 0,00008
fit-int-back / 0,00128 / 0,00004 / 0,00091 / 0,00006
ref-int-back / 0,00122 / 0,00004 / 0,00074 / 0,00008
mean / 0,00127 / 0,00002 / 0,00085 / 0,00004

Figure 8. JMU6.1 tank #19 Raman analysis results of June10th a) spectrum b) analysis results. Air contamination is present. D2 concentrations is in the 8 10-4 range, lower than H2.

Figure 8 shows the spectrum and the Table of results.Air is visible.

The final results are:

H2/HD = (0,001270,00002)

D2/HD = (0,000850,00004).

b. 15/9/16 JMU-6.1tank#19 HD gas was measured againon September 16th. Gas is still contaminated by air. Results are compatible with the first measurement

jmu6-1 tank 19 15_9_16 - 1606 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00139 / 0,00004 / 0,00091 / 0,00006
ref-ga+b / 0,00140 / 0,00004 / 0,00080 / 0,00010
fit-int-back / 0,00139 / 0,00004 / 0,00092 / 0,00007
ref-int-back / 0,00138 / 0,00004 / 0,00080 / 0,00010
mean / 0,00139 / 0,00002 / 0,00086 / 0,00004

Figure 9. JMU6.1 tank #19 Raman analysis results of September 16th a) spectrum b) analysis results. Air contamination is present. H2 and D2andconcentrations are slightly higher than previous measurement.

Figure 9 shows the spectrum and the Table of results.Air is visible.

The final results are:

H2/HD = ( 0,001390,00002)

D2/HD = ( 0,000860,00004).

c. 15/11/19 JMU-6.1 tank#19 HD gas was measured againon November 19th. Gas is still contaminated by air. H2 concentrations slightly increase while D2do not.

jmu6-1 tank 19 15_11_19 - 1171 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00158 / 0,00005 / 0,00089 / 0,00009
ref-ga+b / 0,00161 / 0,00006 / 0,00080 / 0,00010
fit-int-back / 0,00159 / 0,00006 / 0,00090 / 0,00010
ref-int-back / 0,00159 / 0,00004 / 0,00080 / 0,00010
mean / 0,00159 / 0,00005 / 0,00085 / 0,00005

Figure 10. JMU6.1 tank #19 Raman analysis results of November 19th a) spectrum b) analysis results. Air contamination is present. H2is slightly higher than previous measurement, D2 is not.

Figure 10 shows the spectrum and the Table of results.Air is visible.

The final results are:

H2/HD = ( 0,001590,00005)

D2/HD = ( 0,000850,00005).

d. 16/10/20 JMU-6.1 tank#19 HD gas was measured againon October 20th 2016. Air contaminated is very small. H2 concentrations slightly increase while D2do not.

jmu6-1 tank 19 16_10_20 - 74 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00174 / 0,00080 / 0,00084 / 0,00010
ref-ga+b / 0,00179 / 0,00080 / 0,00067 / 0,00010
fit-int-back / 0,00170 / 0,00009 / 0,00085 / 0,00010
ref-int-back / 0,00175 / 0,00008 / 0,00065 / 0,00010
mean / 0,00175 / 0,00006 / 0,00075 / 0,00005

Figure 11. JMU6.1 tank #19 Raman analysis results of October 20th a) spectrum b) analysis results. Air contamination is present. H2 is slightly higher than previous measurement, D2 is not.

Figure 11 shows the spectrum and the Table of results.Air is visible.

The final results are:

H2/HD = ( 0,001750,00006)

D2/HD = ( 0,000750,00005).

JMU6.1tank # 31

Measurements list:

July 14thcontains air

September 16thcontains air

November 19thcontains air

October 21th 2106contains air

a. 15/7/14 JMU-6.1tank#31 HD gas was used to fill the Raman cell on July 14th. Gas is contaminated by air. D2 is at the 4x10-4 level, H2 content is three times higher respect to D2 content.

jmu6-1 tank 31 15_7_14 - 1884 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00165 / 0,00004 / 0,00042 / 0,00005
ref-ga+b / 0,00167 / 0,00004 / 0,00034 / 0,00009
fit-int-back / 0,00166 / 0,00004 / 0,00042 / 0,00006
ref-int-back / 0,00166 / 0,00004 / 0,00034 / 0,00009
mean / 0,00166 / 0,00004 / 0,00040 / 0,00005

Figure 12. JMU6.1 tank #31 Raman analysis results of July 14th a) spectrum b) analysis results. Air contamination is present. H2 concentrations are four timesD2 concentrations.

Figure 12 shows the spectrum and the Table of results.Air is visible.

The final results are:

H2/HD = (0,001660,00004)

D2/HD = (0,000400,00005).

b. 15/9/16 JMU-6.1 tank#31 HD gas was measured againon September 16th. Gas is not contaminated by air. Does match previous measurement with a slight increase of concentrations.

jmu6-1 tank 31 15_9_16 - 1965 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00168 / 0,00004 / 0,00043 / 0,00005
ref-ga+b / 0,00170 / 0,00003 / 0,00035 / 0,00008
fit-int-back / 0,00169 / 0,00004 / 0,00044 / 0,00005
ref-int-back / 0,00167 / 0,00004 / 0,00035 / 0,00008
mean / 0,00169 / 0,00003 / 0,00041 / 0,00003

Figure 13. JMU6.1 tank #31 Raman analysis results of September 16th a) spectrum b) analysis results. Air contamination is present. Results are compatible,H2contamination is slightly higher thanin previous measurements.

Figure 13 shows the spectrum and the Table of results.

The final results are:

H2/HD = ( 0,001690,00003)

D2/HD = ( 0,000410,00003).

c. 15/11/19 JMU-6.1 tank#31 HD gas was measured againon November 19th. Gas is not contaminated by air. High recombination occurred.

jmu6-1 tank 31 15_11_19 - 886 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,04340 / 0,00050 / 0,04600 / 0,00100
ref-ga+b / 0,04350 / 0,00030 / 0,04680 / 0,00040
fit-int-back / 0,04370 / 0,00070 / 0,04700 / 0,00200
ref-int-back / 0,04350 / 0,00030 / 0,04660 / 0,00030
mean / 0,04350 / 0,00030 / 0,04660 / 0,00020

Figure 14. JMU6.1 tank #31 Raman analysis results of November 19th a) spectrum b) analysis results. Air contamination is present. Huge recombination occurred.

Figure 14 shows the spectrum and the Table of results.Huge recombination is observed.

The final results are:

H2/HD = ( 0,043500,00030)

D2/HD = ( 0,046600,00020).

d. 16/10/21 JMU-6.1 tank#31 HD gas was measured againon October 21th2016. Gas is not contaminated by air. Does match the second measurement with a slight increase of concentrations.

jmu6-1 tank 31 16_10_21 - 110 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00263 / 0,00060 / 0,00460 / 0,00080
ref-ga+b / 0,00280 / 0,00060 / 0,00340 / 0,00080
fit-int-back / 0,00262 / 0,00070 / 0,00460 / 0,00080
ref-int-back / 0,00270 / 0,00070 / 0,00337 / 0,00100
mean / 0,00270 / 0,00030 / 0,00400 / 0,00040

Figure 15. JMU6.1 tank #31 Raman analysis results of October 21th2016 a) spectrum b) analysis results. Lower recombination is observed.

Figure 15 shows the spectrum and the Table of results.Much lower recombination is observed.

The final results are:

H2/HD = ( 0,002700,00030)

D2/HD = ( 0,004000,00040).

JMU6.1 tank # 4

Measurements list:

July 15thno air – neon?

September 16thsome air is present

November 20thno air is present

a. 15/7/15 JMU-6.1 tank#4 HD gas was used to fill the Raman cell on July 15th. H2 is in the low 10-3and D2 in the high 10-4 level.

jmu6-1 tank 4 15_7_15 - 1611 max count
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00113 / 0,00004 / 0,00078 / 0,00007
ref-ga+b / 0,00115 / 0,00004 / 0,00080 / 0,00010
fit-int-back / 0,00113 / 0,00009 / 0,00080 / 0,00010
ref-int-back / 0,00114 / 0,00005 / 0,00080 / 0,00010
mean / 0,00114 / 0,00004 / 0,00079 / 0,00009

Figure 16. JMU6.1 tank 4 Raman analysis results of July 15th a) spectrum b) analysis results. H2 concentrations are higher than D2 concentrations in the low 10-3 range.

Figure 16 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,001140,00004)

D2/HD = (0,000790,00009).

b. 15/9/16 JMU-6.1 tank#4 HD gas was used to fill the Raman cell on September 16th. H2 and D2 content slightly increased compared with previous measurement.

jmu6-1 tank 4 15_9_16 - 2007 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00134 / 0,00004 / 0,00102 / 0,00005
ref-ga+b / 0,00136 / 0,00004 / 0,00100 / 0,00010
fit-int-back / 0,00135 / 0,00005 / 0,00104 / 0,00007
ref-int-back / 0,00133 / 0,00004 / 0,00098 / 0,00009
mean / 0,00134 / 0,00004 / 0,00102 / 0,00003

Figure 17. JMU6.1 tank 4 Raman analysis results of September 16tha) spectrum b) analysis results. H2 concentrations andD2 concentrations are in the low 10-3 range.

Figure 17 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,001340,00004)

D2/HD = (0,001020,00003).

c. 15/11/20 JMU-6.1 tank#4 HD gas was used to fill the Raman cell again on November 20th. H2 and D2 content higly increased compared with previous measurements.

jmu6-1 tank 4 15_11_20 - 854 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,05380 / 0,00060 / 0,06000 / 0,00200
ref-ga+b / 0,05356 / 0,00008 / 0,06020 / 0,00020
fit-int-back / 0,05400 / 0,00005 / 0,06100 / 0,00200
ref-int-back / 0,05350 / 0,00050 / 0,06020 / 0,00070
mean / 0,05390 / 0,00010 / 0,06020 / 0,00020

Figure 18. JMU6.1 tank 4 Raman analysis results of November 20th a) spectrum b) analysis results. H2 concentrations and D2 concentrations are highly increased.

Figure 18 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,053900,00010)

D2/HD = (0,060200,00020).

d. 16/10/20 JMU-6.1 tank#4 HD gas was used to fill the Raman cell again on October 20th2016. H2 and D2 contentsare reduced compared with previous measurements.

jmu6-1 tank 4 16_10_20 - 66 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00235 / 0,00090 / 0,00195 / 0,00200
ref-ga+b / 0,00237 / 0,00100 / 0,00201 / 0,00200
fit-int-back / 0,00236 / 0,00100 / 0,00200 / 0,00200
ref-int-back / 0,00232 / 0,00100 / 0,00197 / 0,00200
mean / 0,00235 / 0,00050 / 0,00198 / 0,00100

Figure 19. JMU6.1 tank 4 Raman analysis results of October 20th a) spectrum b) analysis results. H2 concentrations and D2 concentrations are reduced.

Figure 19 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,002350,00050)

D2/HD = (0,001980,00100).

JMU6.0 uva tank # 9

Measurements list:

July 15thno air

September 17thsome air

November 20th no air

October 21st 2016

a. 15/7/15 JMU-6.0uva tank#9 HD gas was used to fill the Raman cell on July 15th. H2 and D2 contents are similar, in the mid 10-3 level.

jmu6-0 uva tank 9 15_7_15 - 1689 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00686 / 0,00004 / 0,00623 / 0,00007
ref-ga+b / 0,00690 / 0,00004 / 0,00640 / 0,00010
fit-int-back / 0,00690 / 0,00004 / 0,00630 / 0,00020
ref-int-back / 0,00690 / 0,00006 / 0,00640 / 0,00010
mean / 0,00689 / 0,00004 / 0,00631 / 0,00005

Figure 20. JMU6.0 uva tank 9 Raman analysis results of July 15th a) spectrum b) analysis results. H2 and D2 concentrations are similar, in the mid 10-3 range.

Figure 20 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,006890,00004)

D2/HD = (0,006310,00005).

b. 15/9/17 JMU-6.0 uva tank#9 HD gas was used to fill the Raman cell on September 17th. H2and D2 are in the in the high 10-4 level.

jmu6-0 uva tank 9 15_9_17 - 1737 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00923 / 0,00004 / 0,00865 / 0,00008
ref-ga+b / 0,00924 / 0,00004 / 0,00899 / 0,00002
fit-int-back / 0,00920 / 0,00010 / 0,00870 / 0,00020
ref-int-back / 0,00924 / 0,00006 / 0,00890 / 0,00010
mean / 0,00923 / 0,00005 / 0,00897 / 0,00005

Figure 21 JMU6.0uva tank 9 Raman analysis results of September 17th a) spectrum b) analysis results. H2 andD2 concentrations are in the high 10-3 range and increased respect to the previous measurement.

Figure 21 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,009230,00005)

D2/HD = (0,008970,00005).

c. 15/11/20 JMU-6.0 uva tank#9 HD gas was used to fill the Raman cell on November 20th. H2 and D2 show high recombination

jmu6-0 uva tank 9 15_11_20 - 921 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,05516 / 0,00004 / 0,06100 / 0,00100
ref-ga+b / 0,05495 / 0,00007 / 0,06110 / 0,00020
fit-int-back / 0,05554 / 0,00006 / 0,06100 / 0,00020
ref-int-back / 0,05520 / 0,00020 / 0,06130 / 0,00030
mean / 0,05520 / 0,00010 / 0,06110 / 0,00010

Figure 22 JMU6.0 uva tank 9 Raman analysis results of November 20th a) spectrum b) analysis results. H2 and D2 concentrations are in the 10-2 range and highly increased respect to the previous measurement.

Figure 22 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,055200,00010)

D2/HD = (0,061100,00010).

d. 16/10/21 JMU-6.0 uva tank#9 HD gas was used to fill the Raman cell on October 21th2016. H2 and D2 show high recombination

jmu6-0 uva tank 9 16_10_21 - 99 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,02010 / 0,00080 / 0,01860 / 0,00100
ref-ga+b / 0,02060 / 0,00070 / 0,01970 / 0,00100
fit-int-back / 0,01950 / 0,00100 / 0,01860 / 0,00200
ref-int-back / 0,01960 / 0,00090 / 0,01870 / 0,00200
mean / 0,02010 / 0,00070 / 0,01900 / 0,00060

Figure 23 JMU6.0 uva tank 9 Raman analysis results of October 21th a) spectrum b) analysis results. H2 and D2 concentrations are in the 10-2 range but reduced with respect to the previous measurement.

Figure 23 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,02010 0,00070)

D2/HD = (0,01900 0,00060).

JMU2 - reference

Measurements list:

July 20thair is present

September 17thno air

November 25thair is present

October

a. 15/7/20 JMU-2reference HD gas was used to fill the Raman cell on July 20th. H2and D2 contents arecomparable, in the mid 10-3.

jmu2 ref 2015 15_7_20 - 2007 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00505 / 0,00004 / 0,00579 / 0,00006
ref-ga+b / 0,00506 / 0,00004 / 0,00588 / 0,00009
fit-int-back / 0,00510 / 0,00006 / 0,00588 / 0,00010
ref-int-back / 0,00505 / 0,00005 / 0,00590 / 0,00010
mean / 0,00506 / 0,00004 / 0,00584 / 0,00006

Figure 24. JMU2 refRaman analysis results of July 20th a) spectrum b) analysis results. H2 andD2 concentrations in the mid 10-3 range.

Figure 24 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,005060,00004)

D2/HD = (0,005840,00006).

b. 15/9/17 JMU-2 reference HD gas was used to fill the Raman cell on September 17th. H2 and D2 are in the in the high 10-3 level.

jmu2 ref 2015 15_9_17 - 2295 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00516 / 0,00003 / 0,00566 / 0,00006
ref-ga+b / 0,00525 / 0,00003 / 0,00580 / 0,00010
fit-int-back / 0,00514 / 0,00008 / 0,00570 / 0,00010
ref-int-back / 0,00525 / 0,00004 / 0,00580 / 0,00010
mean / 0,00521 / 0,00003 / 0,00572 / 0,00004

Figure 25 JMU6.1.10 SS tank 5 Raman analysis results of September 19th a) spectrum b) analysis results. H2 and D2 concentrations are in the high 10-3 range.

Figure 25 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,005210,00003)

D2/HD = (0,005720,00004).

c. 15/11/25 JMU-2 reference HD gas was used to fill the Raman cell on November 25th. H2 and D2 are in the in the high 10-3 level.

jmu2 ref 2015 15_11_25 - 1626 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,00634 / 0,00004 / 0,00722 / 0,00008
ref-ga+b / 0,00635 / 0,00004 / 0,00730 / 0,00010
fit-int-back / 0,00642 / 0,00005 / 0,00740 / 0,00010
ref-int-back / 0,00632 / 0,00006 / 0,00730 / 0,00010
mean / 0,00636 / 0,00003 / 0,00729 / 0,00005

Figure 26 JMU6.1.10 SS tank 5 Raman analysis results of November 25th a) spectrum b) analysis results. H2 and D2 concentrations are in the high 10-3 range. Slightly increased.

Figure 26 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,006360,00003)

D2/HD = (0,007290,00005).

d. 15/11/25 JMU-2 reference HD gas was used to fill the Raman cell on March 23rd 2017. H2 and D2 are in the in the high 10-3 level.

jmu2 ref 2017_03_23 - 29 max counts
method / H2/HD / Δ (H2/HD) / D2/HD / Δ(D2/HD)
fit-ga+b / 0,03097 / 0,00200 / 0,00609 / 0,00200
ref-ga+b / 0,03450 / 0,00200 / 0,00614 / 0,00200
fit-int-back / 0,02380 / 0,01000 / 0,00690 / 0,01000
ref-int-back / 0,03180 / 0,00200 / 0,00591 / 0,00080
mean / 0,03027 / 0,00100 / 0,00600 / 0,00070

Figure 27 JMU6.1.10 SS tank 5 Raman analysis results of November 25th a) spectrum b) analysis results. H2 and D2 concentrations are in the high 10-4 range. Slightly increased.

Figure 27 shows the spectrum and the Table of results.

The final results are:

H2/HD = (0,030270,00100)

D2/HD = (0,006000,00070).

2. Final measured data table

H2/HD Gas / June-July / September 15-17 / November 18-25 / October 17-21 2016 / Final
JMU 6.1 tank #6 / 0,00067 / 0,00002 / 0,00095 / 0,00005 / 0,00200 / 0,00003 / 0,02300 / 0,00020
JMU 6.1 tank #1 / 0,00107 / 0,00003 / 0,00143 / 0,00005 / 0,00188 / 0,00005
JMU 6.1 tank #19 / 0,00122 / 0,00002 / 0,00139 / 0,00002 / 0,00159 / 0,00005 / 0,00175 / 0,00006
JMU 6.1 tank #31 / 0,00166 / 0,00004 / 0,00169 / 0,00003 / 0,04349 / 0,00030 / 0,00270 / 0,00030
JMU 6.1 tank #4 / 0,00114 / 0,00004 / 0,00134 / 0,00004 / 0,05390 / 0,00010 / 0,00235 / 0,00100
JMU 6.0 UVa #9 / 0,00689 / 0,00004 / 0,00923 / 0,00005 / 0,05520 / 0,00010 / 0,02007 / 0,00070
JMU 2 reference / 0,00506 / 0,00004 / 0,00521 / 0,00003 / 0,00636 / 0,00004 / 0,03231 / 0,00140
D2/HD Gas / June-July / September 15-17 / November 18-25 / October 17-21 2016 / Final
JMU 6.1 tank #6 / 0,00064 / 0,00004 / 0,00099 / 0,00008 / 0,00190 / 0,00010 / 0,02500 / 0,00030
JMU 6.1 tank #1 / 0,00111 / 0,00006 / 0,00135 / 0,00005 / 0,00145 / 0,00005
JMU 6.1 tank #19 / 0,00085 / 0,00004 / 0,00086 / 0,00004 / 0,00085 / 0,00005 / 0,00075 / 0,00005
JMU 6.1 tank #31 / 0,00040 / 0,00005 / 0,00051 / 0,00009 / 0,04660 / 0,00030 / 0,00405 / 0,00040
JMU 6.1 tank #4 / 0,00079 / 0,00009 / 0,00102 / 0,00003 / 0,06020 / 0,00020 / 0,00198 / 0,00100
JMU 6.0 UVa #9 / 0,00631 / 0,00005 / 0,00897 / 0,00005 / 0,06110 / 0,00010 / 0,01900 / 0,00060
JMU 2 reference / 0,00584 / 0,00004 / 0,00572 / 0,00006 / 0,00729 / 0,00008 / 0,00600 / 0,00070