KamLAND
(Kamioka Liquid-scintillator Anti-Neutrino Detector)

click on images to enlarge...

General arrangement. First muon event.

KamLAND overall scheme:   pdf 

Released engineering drawings and specifications
(Z-axis system):

21F9226  SYSTEM CABLING SCHEMATIC
21F9006  GENERAL UTILITY ARRANGEMENT, PLAN
21F9016  GENERAL UTILITY ARRANGEMENT, ELEVATION
21F9176  Z-AXIS SYSTEM ASSY
21F9074       GASKET, M5A
21F9066       M5A FLANGE WELDING
21F9054            M5A FLANGE MACHINING
21F9193       GASKET, M5B
21F9086       SPOOL, M5B
21F9106       SPOOL, M5C
21F9114       SPOOL, M5D
21F9146       ENVELOPE, Z-AXIS GLOVE BOX
__M938            SYSTEMS MONITORING GLOVE BOX SPEC
21F9216  LED INSTALLATION
21F9202       LED CAPSULE ASSY
21F9152       HOUSING, LED CAPSULE
21F9161       LENS, LED CAPSULE
__M936            LED WIRE PREPARATION SPEC
__M937            LED POTTING PROCEDURE SPEC
21F9044       BRACKET, LED
21F9023  ELECTRONICS HUT
__M939            ELECTRONICS HUT PROCUREMENT SPEC

Chimney port notation => pdf

Aug 10, 1999 (courtesy of Prof. Atsuto Suzuki)


Spherical vessel construction photographs
(courtesy of Tohoku University):

  • Vessel Chimney  
  • The vessel  
  • Deck and chimney (a)  
  • Deck and chimney (b)  
  • Acryllic support installation  


    Photo-Multiplier Tubes (PMTs) and
    Light Emitting Diodes (LEDs)

  • PMT data sheet   (courtesy Hamamatsu Corp.)
  • PMT and support drawings
  • PMT Socket Refurbishment
  • rhombic triacontahedron (defined)
  • rhombic triacontahedron (PMT installation pattern)
  • see also drawing 21F9216, "LED INSTALLATION" , above.

    PMTs are distributed on the inside surface of the spherical vessel, pointing inwards.    The PMTs are grouped in arrays of 16 each, resulting from the central projection of the 30 diamond shaped facets of a rhombic triacontahedron (polyhedron) onto the inside surface of the vessel.   30 calibration LED's are installed, one at the center of each PMT array.  The LED's are attached to posts which support matching sub-facets of the internal acrylic sphere.  The acrylic sphere separates the PMT's from the balloon, acting as a radon barrier within the buffer oil volume.


    KamLAND Home Page => html
    LBNL KamLAND Page => html

  • The principal partner in the KamLAND international collaboration is Tohoku University, located in Sendai,  Japan, approximately 306_km (190_mi) north of Tokyo.
  • The KamLAND installation site is in Kamioka, Japan, approximately 236_km (147_mi) west of Tokyo.
  • The KamLAND collaboration meeting of September 17-19, 1999 was held at the University of Hawaii, Manoa, in Honolulu, near Waikiki beach, on the island of Oahu (sigh).
  • Early LBNL CAD rendering (technically inaccurate and out of date, but still pretty to look at) => gif
  • "Who ordered that?" (the muon) => pdf

    February 13, 2003
    Peter A. Luft
    PALuft@lbl.gov
    Lawrence Berkeley National Laboratory
    Berkeley, California
    (510) 486-4574