# Presentation: 033290

## Safety Review Agenda

**US CMS EMU Factory**

**Safety Review Agenda**
**Introduction****	****	****	****	****G.Apollinari****	****	****5 m**
**Need for Safety Review****	****	****	****R.Ruthe****	****    ****	****	****10 m**
**Charter for the Safety Review Panel****	****R. Ruthe****	****          ****	****	****5 m**
**Overview of Production at MP9****	****	****G.Apollinari****	****          ****	****15 m**
**Floor Walk Through****	****	****	****All****	****	****          ****	****20 m**
**Safety aspects of Tooling Equipment****	****N.Chester****	****          ****	****20 m**
**Review of Operating Procedures****	****G.Smith****	****         ****	****	****20 m**
**Next actions and Meeting****	****	****	****R.Ruthe****	****        ****	****	****10 m**

## US CMS EMU Factory

**Introduction**

## US CMS EMU

**Introduction**

**Fermilab has responsibility for the design and production of the components for all the CMS_EMU chambers**
**ME23/2****	****	****Subject of this Review**
**ME2/1**
**ME3/1**
**ME1/2**
**ME1/3**
**Fermilab has responsibility for the assembly of 144 ME23/2 chambers and preparation of kits for Russia (PNPI) and China (IHEP)**

## US CMS EMU

**Introduction**

**Major Milestones**
**Start Panel Production for ME23/2****	****	****April 1999**
**	****	****	****	****	****	****	****	****Started in June 99**
**Start ME23/2 Chamber Production****	****	****October 1999**
**Start Panel Production for IHEP/PNPI****	****January 2000****	****	**

## US CMS and CMS-EMU Organization Structure

**US CMS EMU**
**Introduction**

**L1 Managers**
**D.Green**
**E.Temple**

**L2 Manager**
**G.Mitselmakher**

**L3 Chamber**
**A.Korytov**

**L3 Electronics**
**T.Ling**

**L3 Infrastructure**
**D. Loveless**

**FNAL**
**G.Apollinari**
**N.Chester**

## US CMS EMU

**US CMS EMU**
**Introduction**

**Operation Readiness Review**
**Design ****	****	****	****	****	**
**QA/QC Program****	****	****	**
**Safety ****	****	****	****	****	**
**Procedures & Travelers****	****	**
**Tooling****	****	****	****	****	**
**Manpower****	****	****	****	**
**Panel/Chamber  Storage & Transportation****	****	****	**
**Schedule****	****	****	**

## US CMS EMU

**Introduction**

**Safety  Review**
**Committee**
**R. Ruthe****	**_**Chairperson**_
**J. Hawkins**
**L. Spiegel**
**G.Smith**
**G.Apollinari**
**Charges to the Committee**
**Assess the mechanical safety aspects of the major tooling equipment operating in the MP9 assembly area.**
**Preparation and training of assembly technicians to ensure adequate qualification for use of tooling equipment.**
**Ergonomics of the assembly line.**

## US CMS EMU

**Introduction**

**Proposed Plan of Work**
**Address few major operations/week in short, focused meetings.**
**Oct 28****	****	****Winding Operation**
**	****	****	****	****Wire Gluing Operation**
**	****	****	****	****Authomatic Soldering Operation**
**Nov 4****	****	****Automatic Gluing Operation**
**	****	****	****	****Clamping Operation **
**	****	****	****	****Air Knife Cleaning Operation**
**Nov 11 ****	****	****HV/LV Testing**
**	****	****	****Tension Testing**
**	****	****	****Gas Leak Testing/Gas Operations**
**	****	****	****Hands Operation**
**Involve Cryogenic group as a sub-committee for few items related to the Gas Operations of the chambers**** (**
**Air Knife Cleaning Operation**
**Gas Leak Testing/Gas Operations**

## US CMS EMU

**US CMS EMU**

## Cathode Strip Chamber

**Well known Technology**
**G. Charpak et al. NIM 167 (1979) **
**Good intrinsic resolution & Fast**
**Two-coordinate measurement**
**Strips can be shaped in any geometry**
**No stringent gas control**
**R&D Development ****	****	**
**Most of the detector design and assembly procedures  prototyped and developed by:**
**G.Mitselmakher**
**O.Prokofiev**
**V.Razmyslavich**
**...****.many others**

**US CMS EMU**
**Detector Considerations**

## EMU CSC 

**Trapezoidal chambers**
**6 plane/chamber**
**6 gas gaps**
**7 panels**
**Strip measuring ******** **
**Strip width from 6.7 to 6.0 mm**
**Wires measuring r**
**50 mm wires ganged in groups of 5 to 16. **

**US CMS EMU**
**Detector Considerations**

## Mechanical Design

**Anode Panels**
**Cathode Panels**

**US CMS EMU**
**Detector Considerations**

## Mechanical Design

**large gas gap (~10 mm)**
**relaxed panel flatness tolerances**
**wide strips**
**wide wire pitch (3.2 mm)**
**relaxed wire placement tolerances**
**no intermediate wire support**
**fewer wires**
**50 ********m wire diameter**
**more reliable mechanically**

**US CMS EMU**
**Detector Considerations**

## US CMS EMU

**Detector Considerations**

**Cathode Panels (4 out of 7)**
**The spacing between panels is defined by:**
**gap bars sanded to  +/- 2 mils**
**buttons located approximately in the center of the panels**

## US CMS EMU

**Detector Considerations**

**Anode Panels (3 out of 7)**
**Wires:**
** ****glued on wire fixation bars (thickness of 1/2 gas gap)**
** ****soldered on pads for electrical connection**
**50 ********m wires under 250+/-25 g tension (breakage at 450 g).**
**Plane segmented into 5 HV sections**

- Insulating Guard Strip

-  Wires

- Panel

## Frame Mounting 

**US CMS EMU**
**Detector Considerations**

## Physics Requirement
Concentrate on requirements affecting the design 

Spatial Resolution ~150 m per chamber
Good knowledge of strips and wires geometry
Strips are located by machining (Gerber)
Location Precision: +/- 5 mils
Dimension of Strips
Position of Strips
Referencing of Strips to Outside World
Wire are adjusted by combs on pre-glued anode bars
Location Precision: +/- 20 mils

**Concentrate on requirements affecting the design **
**Spatial Resolution ~150 ********m per chamber**
**Good knowledge of strips and wires geometry**
**Strips are located by machining (Gerber)**
**Location Precision: +/- 5 mils**
**Dimension of Strips**
**Position of Strips**
**Referencing of Strips to Outside World**
**Wire are adjusted by combs on pre-glued anode bars**
**Location Precision: +/- 20 mils**

**US CMS EMU**
**Detector Considerations**

## Physics Requirement (cont.)
Gas Gain Uniformity
Gas gain depends on gas gap 
Gas gap must be held constant in the horizontal (cosmic testing) and vertical positions.
Requirement: G/G < 2 
 d (gap dimension)  < 24 mils
Use gap bars (chamber perimeter)  
Use gap buttons (center) 
Avoid build up of tolerancies over 6 layers
Panel Requirement
Flatness
Thickness 
Resistance to compressive forces

**Gas Gain Uniformity**
**Gas gain depends on gas gap **
**Gas gap must be held constant in the horizontal (cosmic testing) and vertical positions.**
**Requirement: ********G/G < 2 **
** ********d (gap dimension)  < 24 mils**
**Use gap bars (chamber perimeter)  **
**Use gap buttons (center) **
**Avoid build up of tolerancies over 6 layers**
**Panel Requirement**
**Flatness**
**Thickness**** **
**Resistance to compressive forces**

**US CMS EMU**
**Detector Considerations**

## Physics Requirement (cont.)
Connections to Outside World
Metric vs. English System 
Overall Tolerancies and Assembly Scheme
Guard Strip location
Correct Anode Fixation  Bar Positioning
Sum-up of tolerancies (Bar fixed to +/- 20 mils)
Overall Assembly
ex: connector holes locations on cathode strips fan-out 

**Physics Requirement (cont.)**
**Connections to Outside World**
**Metric vs. English System **
**Overall Tolerancies and Assembly Scheme**
**Guard Strip location**
**Correct Anode Fixation  Bar Positioning**
**Sum-up of tolerancies (Bar fixed to +/- 20 mils)**
**Overall Assembly**
**ex: connector holes locations on cathode strips fan-out **

**US CMS EMU**
**Detector Considerations**

- Anode Panel

- Cathode Panel

**BAD**