Status of horns
This presentation is the property of its rightful owner.
Sponsored Links
1 / 26

Status of horns PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

Graphite Target. beam. 1st Horn. 2nd Horn. 3rd Horn. I=320kA. Status of horns. A.K.Ichikawa. Activities. T. Sekigutchi joined the target-horn group. US group (E.D.Zimmerman, J.Spitz, L.Bartoszek) have contributed on beam MC study, design of horns. Other contributions by T. Nakadaira,

Download Presentation

Status of horns

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Status of horns

Graphite Target


1st Horn

2nd Horn

3rd Horn


Status of horns




  • T. Sekigutchi joined the target-horn group.

  • US group (E.D.Zimmerman, J.Spitz, L.Bartoszek) have contributed on beam MC study, design of horns.

  • Other contributions by T. Nakadaira,

    S. Tada, Y. Yamada, S. Koike, Y. Suzuki,

    T. Kobayashi et al.

Overview of target station

Overview of Target Station








Iron structure (= helium vessel)

supports horns and shields

Beam mc study by j spitz

Beam MC study by J. Spitz

  • J.Spitz’s report is available at

  • Effects of mis-alignment -> Covered at the last collab.meeting

  • Effects of the horn current drop

  • Effects of beam angle deflection

  • Possible beam plug at 4MW

Effects of horn1 current drop

On-axis Peak Energy

Effects of Horn1 current drop


Flux at Super-K

0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 %


Off-axis Peak Energy


0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 %

0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 %

1 st horn and 3 rd horn

1st horn and 3rd horn

  • Design and production of prototype is on going toward the current operation test.

1 st horn prototype

1st horn –prototype-

Design of the 1 st horn peripherals

Design of the 1st horn peripherals

  • Done by BARTOSZEK Engineering

    • Water seal (EVAC, helicoflex)

    • Water pipe

    • Auxiliary drain

    • Galvanic corrosion

    • Stripline heat load

    • etc. etc. etc.

  • Production of them and assembling was contracted and to be completed at March.

Status of horns

Striplines locate far from horn body to reduce heat load from radiation

Setup for the test operation.

Striplines are extended downward for the test.

Status of horns

Water supply pipes are bent to absorb oscillation.

Water nozzle attachment water tightness insulation and galvanic corrosion

Water Nozzle attachment-water tightness, insulation and galvanic corrosion-

Stainless flange

Helicoflex seal

Ceramic disk to insulate outer-conductor and water-pipes

Aluminum knife-edge seal for water seal


Nozzle head



Forced He cooling is necessary to cool heat load from radiation.

Clamp to resist the Lorenz force is designed not to prevent He flow.

Stress w/ Lorenz force


3 rd horn prototype

3rd horn –prototype-

Status of horns

  • Outer-conductor contracted

  • Ceramic ring (f1430mm!) contracted

Items other than horns

Items other than horns

Water system pumping up 7m in ultra high radiation environment two options

Water system pumping up 7m in ultra-high radiation environment -two options-

Self priming canned motor pump

Test will be done soon with canned motor pump option.


Ejector pump

Support module

Support module

75mm thick plate

Pipes and supporting shafts go through this plate.

Rigidity is the issue to achieve 1mm alignment

Here, we will have remote connection mech. for support, pipes and striplines.

Fem analysis by s koike

FEM analysis by S. Koike

Distortion is <0.3mm.

(Tolerance of the horn alignment is 1mm.)

Strong enough for earthquakes and (unexpected) 2-points crane hanging.

Radiation level calculation by Y. Oyama.-> not fully satisfactory but maybe acceptable.

We plan to make prototype in next FY.

Support module alignment mech

Support module Alignment mech.

Kinematic mount on leveling block on xy-stage.

X,Y,Z position can be adjusted with freedoms to absorb manufacturing errors.

When the module installed remotely by crane, it can positioned automatically while absorbing manufacturing errors.

Status of horns

Dummy load(4ton)

It works well!

Stripline remote connection

Stripline remote connection

Hot lab

Hot Lab.

Remote disconnection/connection from this level

  • Lift table

    • It must be controlled remotely.

    • On the lift table, there are x and y stages.



  • Schedule

    • Continue Design and R&D in FY2006

      • Current operation test, support module, remote handling etc. etc.

    • Produce everything in FY2007

    • Installation in FY2008

Status of horns





Status of horns

Alignment of (e) part of the new horn will be done at the Dock using a spare support box, on which alignment of (a) and (c) are already done.

We assume that it will be valid with the existing support box.

Spare support box

New horn

Status of horns

1st horn and 2nd horn

3rd horn

Only (b) has an re-adjustable mechanism.

Other parts will be fixed once it is adjusted.

(a) and (c) : correct manufacturing error of the support box.

(b) correct target station He chamber distortion.

(d) guide mechanism between the support box and horn frame.

(e) correct manufacturing error of the horn frame.






Remote coupling here for easy access from the top level.

  • Login