1. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 The empiric elimination of the water vapour influence 1 Martin Vicar, 2 Ladislav Peksa, 2 Tomas Gronych, 1 Zdenek Krajicek, 1 Dominik Prazak, 2 Martin Jerab, 1 Frantisek Stanek 1 Czech Metrology Institute 2 Charles University in Prague

2. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE TASK: TO STATE THE UNKNOWN HELIUM FLOW FROM THE LEAK PROCEDURE USED: INDIRECT COMPARISON WITH THE STANDARD LEAK USING THE QUADRUPOLE MASS SPECTROMETER AS A COMPARATOR

3. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE TASK: TO STATE THE UNKNOWN HELIUM FLOW FROM THE LEAK PROCEDURE USED: INDIRECT COMPARISON WITH THE STANDARD LEAK USING THE QUADRUPOLE MASS SPECTROMETER AS A COMPARATOR QMS PUMPING UNKNOWN FLOW 1KNOWN FLOW 2 OR PFEIFFER PRISMA QUADRUPOLE MASS SPECTROMETER

4. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 QMS PUMPING UNKNOWN FLOW 1KNOWN FLOW 2 OR PFEIFFER PRISMA QUADRUPOLE MASS SPECTROMETER ASSUMPTION 1: P = Q / PUMPING SPEED ASSUMPTION 2: I = SENSITIVITY * P

5. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 ASSUMPTION 1: P = Q / PUMPING SPEED ASSUMPTION 2: I = SENSITIVITY * P QMS PUMPING UNKNOWN FLOW 1KNOWN FLOW 2 OR PFEIFFER PRISMA QUADRUPOLE MASS SPECTROMETER

6. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE OBSERVED SIGNAL FOR HELIUM – UNEXPECTED UNSTEADY SIGNAL

7. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE OBSERVED SIGNALS FOR HELIUM AND WATER

8. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE CORRELATION BETWEEN SIGNALS FOR HELIUM AND WATER

9. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE CORRELATION BETWEEN SIGNALS FOR HELIUM AND WATER MODEL:

10. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE CORRELATION BETWEEN SIGNALS FOR HELIUM AND WATER MODEL:

11. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE CORRELATION BETWEEN SIGNALS FOR HELIUM AND WATER MODEL:

12. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE CORRELATION BETWEEN SIGNALS FOR HELIUM AND WATER MODEL:

13. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 + SIMPLE METHOD + INTERESTING RESULTS + CAN BE USED IF HELIUM SIGNAL DECLINES WHEN WATER SIGNAL RISES – DOES NOT GIVE USEABLE RESULTS FOR CASES WHEN HELUM SIGNAL RISES TOGETHER WTH THE WATER SIGNAL – WE HAVE NOT THE EXACT THEORETHICAL EXPLANATION ABOUT THE INTERACTION MECHANISM AND PLACE

14. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THE RELATIVE DECREASING / INCREASING OF THE HELIUM SIGNAL

15. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 THERE EXIST DIFFERENT PHENOMENA WHICH SHOULD BE TAKE INTO ACCOUNT. SOLUTIONS CORRECT SIGNAL AS DESCRIBED ABOVE (WHEN POSSIBLE). CLOSE THE SMALL VALVE OF THE CALIBRATED STANDARD LEAK (ENSURES MORE STABLE CONCENTRATIONS OF THE ATMOSPHERIC GASES). USE SPECIAL APPARATUS FOR HELIUM LEAKS COMPARISON. OPEN QUESTIONS DOES EXIST A THEORETICAL BACKGROUND THAT COULD JUSTIFY OUR EMPIRICAL CORRECTION PROCEDURE?

16. OBSERVATIONOVERVIEWCONCLUSION MODEL STUDYPROS & CONSRESULTS Martin Vicar ‒ The empiric elimination of the water vapour influenceEMRP IND12 workshop, 2012 Thank you for your attention. Martin Vicar mvicar@cmi.cz