# Presentation: 606847

## Mercury Intense Target (MERIT)Final Design Review

**Design Approach, Requirements, Schedule, and Procurement**
**P.T. Spampinato**
**V.B. Graves**
**T.A. Gabriel**
**MERIT Collaboration Meeting**
**MIT Plasma Science & Fusion Center**
**October 17-19, 2005**

## Design Review Covers Remainderof the Hg Delivery System(... the syringe pump is being procured)

**Cutaway views of the target system**

## Design Approach – Two Design Packages to Expedite Procurement

**(1) Syringe Pump**
**Syringe pump design replaced the original centrifugal pump due to the high pressure requirement for the system to deliver a 20 m/s jet**
**Two hydraulic cylinders drive a Hg cylinder**
**Stainless vs carbon steel cylinders**
**Procurement underway at BNL and the vendor has been chosen**

**(2) Target Delivery System**
**Consists of primary and secondary containments, supports, sump tank, instruments, filtered vent, supply line, laser optic windows, and beam windows**
**Procurement in November using BNL procurement process**

## What is the MERIT?

**The Hg Intense Target (MERIT) is part of the proof-of-principle experiment to investigate the interaction of a proton beam, high magnetic field, and free-jet Hg target**

## Target Containment is Designed To Meet ISO 2919 per CERN

_***ISO 2919 “Classification of Sealed Source Performance” Table 2, Class 2***_
**Temperature: 40o C (20 minutes); 80o C (1 hour) *****(by analysis)***
**External Pressure: 25 kPa absolute (60 psi) to atmospheric  *****(for the primary containment only, incl. quartz windows? – by analysis)***
**Impact: 50 grams from 1 meter, or equivalent imparted energy**
**	*****(P.C.-quartz windows – test?; S.C.-Lexan® panel and sleeve – test?)***
**Vibration: 3 times 10 minutes, 25-500 Hz at 49 m/s****2**
**	****	****(5 g****n****, acceleration maximum amplitude) *****(n/a)***
**Puncture:  1 gram from 1 meter, or equivalent imparted energy**
**	*****(sleeve – test?)***

## Design Approach (cont.)

**Pump equipment and target delivery system are designed at ORNL**
**Funding is provided for design, assembly, and testing**
**Procure all hardware thru BNL (except for misc. items)**
**Assemble equipment and test the system at ORNL/TTF**
**Characterize operating parameters of the target equipment and the laser diagnostic (pictures of Hg jet)**
**Ship the target to MIT along with auxiliary equipment, and support base structure**
**Integrated system tests at MIT (w/ solenoid)**
**Characterize operating parameters in the magnetic field environment (pictures of Hg jet in high field)**
**Fit up test of solenoid/target equipment on base support structure**
**Ship back to ORNL – current recommendation by the ORNL Transportation Group**
**Ship to CERN along with all support equipment**
**Beam-on-target tests at CERN**
**Proof-of-principal tests in TT2A tunnel, store, decon, pack, and**
**Ship mildly activated equipment plus Hg back to ORNL**

## Reqmts and Operating Conditions:

**1-cm diameter jet at 20 m/s delivered every 30 minutes**
**>1-sec steady state jet during the magnet peak field**
**Full-beam interaction length is 30-cm**
**24 GeV, 1 MW proton beam, <20x10****12**** ppp**
**Beam line is 120-cm (47.2”) above the tunnel floor**
**Up to 100 pulses for the CERN test, >500 operating cycles for system testing**
**The pump equipment operates in a range of 6000 Gauss to 300 Gauss (*****1 Tesla = 10******4****** Gauss)***

*Target system must deliver a stable, unconstrained jet of Hg in 1-atmosphere of air, into a 15 Tesla field*

## Magnetic Field Profile

**15 Tesla peak field has a 1-sec flat top at t = 9.5 s**

**Peak Field**

**Stray field profile**

## Geometry of the Interaction Region

**0.4****° horizontal kick**
**Jet to beam is 33 millirad (1.89****°); *****jet to magnetic axis is 100 millirad (5.73°)***
**The PB crosses the jet centerline at Z=0, which is also at 15 T in the center of the solenoid**

## Containment Schematic

## Operational Requirements (cont.)

**Target system (wetted) materials shall be stainless steel 316 or 304; other materials shall be non-magnetic, i.e., the aluminum base support**
**Gaskets/seals shall be non-reactive with Hg and radiation tolerant to 10****4**** rads (prelim. estim.)**
**Nominal operating temperature of the Hg is 25****°****C**
**Installation/alignment:**
**target probe axis into solenoid bore, concentric within ****±1.0 mm**
**position target/solenoid assembly to beam line within ****±0.5 mm *****(******fiducials are to be located from the solenoid)***

## Project Schedule

**Assemble syringe pump and target hardware May 2006**
**Target system tests at ORNL Jul-Aug 2006**
**Integrated system tests at MIT Sep-Oct 2006**
**Beam-on-target experiment at CERN Mar-Apr 2007**

## Procurement Plan

**Procurement will be handled thru BNL since ORNL funding is limited to equipment design, assembly, and testing**
**Complete the Final Design Review – ****in process**
**Update design – ****next week**
**Write a fabrication specification that consists primarily of Solid Works****®**** drawings – ****two weeks**
**Send specifications to BNL -**** before the**** ****end of**** ****November**** **
**Delivery of target system hardware including support structure to ORNL -**** spring 2006**

## Conclusions

**Procurement for delivery has slipped ~ 1 month**
**Not a problem; sufficient slack in schedule**
**Syringe pump system contract awarded – BNL**
**Delivery system procurement to BNL before the end of November**
**Target system is on schedule to meet April 2007 testing at CERN**