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Some Remarks Konrad Elsener (CERN)

Some Remarks

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Some Remarks. Konrad Elsener (CERN). The early days of NBI workshops (and before that…). Google for “Yamanoi KEK”. MINUTES OF E362 FRONT DETECTOR MEETING Date: 16:00-17:00, October 20, 1995 Place: KEK meeting room (next to Library) - PowerPoint PPT Presentation

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Page 1: Some Remarks

Some Remarks

Konrad Elsener (CERN)

Page 2: Some Remarks

The early days of NBI workshops (and before that…)

Google for “Yamanoi KEK”

Page 3: Some Remarks

MINUTES OF E362 FRONT DETECTOR MEETING Date: 16:00-17:00, October 20, 1995Place: KEK meeting room (next to Library)Present: Nishikawa (Chairman), Chikamatsu, Miyamoto (INS), Miyano(Niigata), Sakuda(KEK), Tamura(Okayama), Nishijima,Etou(Toukai), A.Suzuki, Kohama(Kobe)

(1) Nishikawa summarizes the preceding Horn meeting (Yamanoi, Ieiri, Yoshi-Suzuki, Miyamoto, Nishikawa, Kohama, A.Suzuki). Yoshi-Suzuki(KEK) ordered a power supply for the Horn for ~1.2 Oku-yens.It will be delivered next April. A public tender for the 2nd Horn will be held in mid-November. One problemwith the horn is how to handle the thermal expansion of the structure,which is estimated to be about 3mm. They consider the structure whose oneend is set free along the direction of the expansion. Miyamoto/Yamanoi independently calculate the stress due to the magneticforce. They agree. The Horn current (I) will be monitored by either the voltage (=IR), Hallprobe or pickup coil.

(2) …

Page 4: Some Remarks

CERN participants: Valeri Falaleev, K.E.(NGS -> CNGS was not yet an approved project)

(Fermilab participants: Jim Hylen and Jorge Morfin)

First NBI workshop - 26-29 July 1999 at KEK

Page 5: Some Remarks

NBI 1999

“K2K”

Page 6: Some Remarks

NBI 1999

Page 7: Some Remarks

NBI 1999Proceedings

… we then moved on to …

Fermilab (2000)CERN (2002)KEK (2003)Fermilab (2005)CERN (2006)J-PARC (2010)

… to the web … … and to INDICO ...

Page 8: Some Remarks

NBI 2003

NBI 2002

ForbiddenYou don't have permission to access /nbi2005/photos/tour/ on this server.

NBI 2005

Page 9: Some Remarks

NBI 2005

NBI 2006NBI 2006

Page 10: Some Remarks

E. Gschwendtner, CERN 10NBI, 8 September 2006

comparison measurement-simulation, horizontal pit1

0

0.05

0.1

0.15

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0.25

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0.35

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-157.5 -146.3 -135 -123.8 -112.5 -101.3 -90 -78.75 -67.5 -56.25 -45 -33.75 -22.5 -11.25 0 11.25 22.5 33.75 45 56.25 67.5 78.75 90 101.25

112.5 123.75

135 146.25

157.5

cm

char

ges/

pot

meas: nominalsim: nominal

Comparison Meas.-Sim. I (Preliminary)

Muon Monitors, Horizontal Pit 1

■ Measurement■ Simulation

Fluka simulation; P. Sala et al

NBI 2006

Page 11: Some Remarks

What’s special about the NBI workshops (why we like them…)

Page 12: Some Remarks

Final Horn Status of K2KKazuhiro TANAKA forthe KEK-PS Beam Channel Group, & the K2K Beam Tuning Team

Page 13: Some Remarks

1st Horn Target Rod (20mm diameter) Break (1.9x106 excitations)

NBI 2005

from K. Tanaka

Page 14: Some Remarks

NBI 2005

Horn Flexible Feeder Trouble (8.5x105 excitations)

from K. Tanaka

Page 15: Some Remarks

KEK Engineering Award 2003

Suzuki and Yamanoi received 3rd KEK Engineering Award for their development of K2K horn system

NBI 2005

from K. Tanaka

Page 16: Some Remarks

0.0E+00

2.0E+06

4.0E+06

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8.0E+06

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1.4E+07

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Run1999

Run2000

H - 3- 5φ 251

H1- 4φ 30

H2- 2

H2- 1

H1- 7φ 30H2- 3

H - 3φ 251

H1- 2φ 20

H1- 6φ 25Parabolic disk

Run2001

H1- 8φ 30

H1- 8φ30

Run2002- 03

Run2004

Operation History of K2K Horns

NBI 2005

from K. Tanaka

Page 17: Some Remarks

On horns, what we learned are···(Presented at NBI2000)

• Horn can work as designed in both mechanically and electrically.

• We should pay attention more and more to peripherals, which can break as designed.

• Test excitation in the actual position should be as many as possible.

• Never compromise with Physicists.• Sufficient time, money, manpower for R/D and for

operation, maintenance.• Believe yourself.

NBI 2005

from K. Tanaka

Page 18: Some Remarks

Conclusion

Page 19: Some Remarks

Have a great workshop !

NBI 2012

(Apologies that I can only be around part-time)