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1 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 1 Decay Tube & Windows Introduction (Location, Planning) Decay Tube Entrance.

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Presentation on theme: "1 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 1 Decay Tube & Windows Introduction (Location, Planning) Decay Tube Entrance."— Presentation transcript:

1 1 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 1 Decay Tube & Windows Introduction (Location, Planning) Decay Tube Entrance Window Exit Window Vacuum System

2 2 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 2 Location Decay tube Sleeves Exit Window Store

3 3 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 3 Location Exit Window Pumps Flange Decay tube Install Install Install

4 4 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 4 Location Pumps Decay tube Exit Window EntranceWindow Install

5 5 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 5 Planning Transport Exit Window & Storage in Hadron Stop Install Decay Tube (November 2003 -May 2004) October Vent Decay Tube Install Entrance Window & Flanges Bring back to vacuum January Install Vacuum Pumps Install Exit Window Install Temporary Entrance Flange Bring Decay Tube to Vacuum August 2003 2004 2005 2006

6 6 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 6 Decay Tube Decay Tube: Internal diameter of 2.45m, 998m long, 18mm thick Made of carbon steel Vacuum 1 mbar Decay Tunnel: Internal diameter of 3.5m, 992m long, slope of 5.6% Supported by shotcrete Decay Tube Sleeves: 6m long (2x3m, welded) Will be combined to 18m long sleeves in target cavern

7 7 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 7 Decay Tube: Transport Transported from surface to target cavern Mechanical workshop in target cavern 3x6m sleeves welded  18m Top View  To decay tube

8 8 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 8 Decay Tube 3 x 6m-sleeves on surface 3 x 6m-sleeves in target chamber 1x18m-sleeve in target chamber

9 9 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 9 Decay Tube: Installation 3 fixed supports 4x10t jacks Lifting beam 4 top supports winch concrete welded & checked

10 10 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 10 Decay Tube: Quality Control Plates / Pipes Dimensions, chemical analysis, mech. characteristics100% Ultrasonic test 20% Contractor - Independent Control Agency - CERN WeldsWorkshop * Decay Tunnel * Visual Inspection 100% 100% Ultrasonic test 85% 100% Dye-Penetrant 100% 100% X-Rays 15%** --- Tightness test of Decay tube - At the end of the works * %=percentage of weld length checked **X-rays check all welds not checked by ultrasound

11 11 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 11 Entrance Window 2mm Titanium window Minimize particle loss  Thin

12 12 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 12 Entrance Window: Safety Installation Temporary Flange FE calculations  ok, no active cooling needed X-ray & pressure test 3 bar  ok Safety during access (vent if doubt) Rupture? Shut Down Window + Shutter

13 13 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 13 Nearest person Entrance Window: Safety But what if rupture during beam? 1mbar 1bar Reduced X-sections Pits as buffer Safety Pressure drop <0.5bar Wind speed <<5m/s Problem? FE-Model Rupture D=1.7m (full) Rupture D=0.5m Results Pressure drop Windspeed 36m/s 10m/s 2200Pa 200Pa

14 14 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 14 Entrance Window: Safety Solution…  High-velocity zone moved Use ventilation to balance pressure (pressure losses in ducts) e.g. 2200Pa, allow 50m/s  Duct of D=0.45m, takes 10 mins Sufficient?  More calculations  Other ideas

15 15 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 15 Exit Window Location

16 16 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 16 Exit Window 50mm Carbon Steel Avoid high temperatures (beam dump: uncontrolled area, no access) FE calculations  not safe (beam dump cooling: extra circuit easy to add)  Active cooling Lower energy particles  Thick

17 17 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 17 Exit Window

18 18 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 18 Exit Window: Installation Oct-03 Aug-04

19 19 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 19 Exit Window: Installation Oct-03

20 20 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 20 Vacuum System

21 21 11/11/2003 NBI 2003 - Decay Tube and Windows Presentation by Ans Pardons 21 Vacuum System Pumps with air cooling or independent cooling circuit Dry pumps  no oil  no duct needed for exhaust Principle of Dry Pump 2 identical pumps of 250m3/h  3 days pumping to obtain 1mbar in decay tube Vacuum Pumps

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