1. Hamamatsu Photonics K.K. Electron Tube Division R7081-02 for ICECUBE 1.Delivery Record and Plan 2.Specification of R7081-02 3.Test Result at Hamamatsu 4.Homework at the meeting in May 5.Sampling Test Method 6.Handling for Rejection tubes Meeting with Dr.Yoshida/Univ of Chiba on June 9 2004 at Hamamatsu

2. Hamamatsu Photonics K.K. Electron Tube Division Delivery Record and Plan (1) 16 tubes were delivered to Univ of Chiba for sampling Test.

3. Hamamatsu Photonics K.K. Electron Tube Division Delivery Record and Plan (2)

4. Hamamatsu Photonics K.K. Electron Tube Division Delivery Record and Plan (3) Hamamatsu expects continuous orders. Delivery rate would be 72 - 120 pcs per month. From Nov.2004 to May 2005 : 500 pcs From Jun.2005 to May 2006 : 1080 pcs From Jun.2006 to May 2007 : 1080 pcs From Jun.2007 to May 2008 : 1080 pcs From Jun.2008 to May 2009 : 1080 pcs

5. Hamamatsu Photonics K.K. Electron Tube Division Specification for R7081-02

6. Hamamatsu Photonics K.K. Electron Tube Division Voltage Divider for R7081-02 Anode Sensitivity, Gain and Pulse Linearity are specified at 1500V, other anode characteristics are specified at supply voltage for Gain of 1.0E+07 with the divider shown in Table.1. note-1 : LLD is set at 0.25 p.e. in the test. note-2 : Hamamatsu doesn't measure it, but guarantees the value.

7. Hamamatsu Photonics K.K. Electron Tube Division Drawing of R7081-02

8. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 150 pcs in 2003 1500V typ.

9. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 150 pcs in 2003 1700V typ. 2000V max.

10. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 150 pcs in 2003

11. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 150 pcs in 2003 2.0 min. 2.5 typ. (K-DY1:600V)

12. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 150 pcs in 2003 3.2 ns typ. (K-DY1:600V)

13. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 150 pcs in 2003 7K cps typ. 15K cps max. (K-DY1:600V)

14. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 150 pcs in 2003 10.0 typ.

15. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 288 pcs in 2004 1500V typ.

16. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 288 pcs in 2004 1700V typ. 2000V max.

17. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 288 pcs in 2004

18. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 288 pcs in 2004 2.0 min. 2.5 typ.

19. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 288 pcs in 2004 3.2 ns typ.

20. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 288 pcs in 2004 7K cps typ. 15K cps max.

21. Hamamatsu Photonics K.K. Electron Tube Division Test Result for 288 pcs in 2004 10.0 typ.

22. Hamamatsu Photonics K.K. Electron Tube Division Dark Counts vs Temp.

23. Hamamatsu Photonics K.K. Electron Tube Division Dark Counts at –10 deg C 4 tubes, which shows larger dark counts, are selected. Dark counts at –10 deg C were checked. (TA0472 is out of SPEC at 25 deg C.)

24. Hamamatsu Photonics K.K. Electron Tube Division Homework at the meeting in May To send Shock & Vibration level of PMT in the Package To send Shock & Vibration level of PMT itself To send Handling Procedure of PMT (ICECUBE wants to know how to handle PMTs.) To send Component List of PMT (If PMT is broken, is it dangerous ??) To send ISO related Document

25. Hamamatsu Photonics K.K. Electron Tube Division Homework at the meeting in May To check Radioactivity of the Glass (Hamamatsu sent crushed glass in Jan.2003.) To check transmittance of the Glass (Hamamatsu sent glass plates in Jan.2003.) To check Fluorescence of the Glass (Hamamatsu sent glass blocks in Aug.2003.) To send available Test data (for correlation) To check appearance of all tubes <= This is being done right now!!

26. Hamamatsu Photonics K.K. Electron Tube Division Sampling Test Method From next batch of 360 pcs order, 10 % of tubes will be sent to Univ of Chiba. (12 pcs per month in Aug., Sept., Oct.) (Delivery would be in July, Aug, Sept..) (Transportation would be 4 times.) Univ of Chiba will test them in 1 month. Test data is used for adjusting production condition and for making correlation.

27. Hamamatsu Photonics K.K. Electron Tube Division How to Handle Rejection Hamamatsu replaces all rejected tubes. All expanse is paid by Hamamatsu. If Hamamatsu doesn’t understand reject reason, the tube has to be returned for evaluation. (It depends, but at every 6 months or so) If reject reason is clear with simple report, it’s not necessary to return the tube.