THERMAL ANALYSIS OF ETA=3 REGION EE AND SEI.Wichrowska-Polok ST/CV

CMS EE workshop 13th of March 2002

1. The purpose of the analysis.2. The model description.3. Boundary conditions4. The results of the analysis.

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 2

THE PURPOSE OF THE ANALYSIS.

Front of HESE

backplate SC array

IES FES

•Temperature of the gas can vary 3 degrees from its mean•Crystals requirements: +/-0.1o in time, 2o in spaceGoals of analysis:•Find temperature variation inside SC array;•Find the effect of insulation of SE cone (20 mm thick).

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 3

THE MODEL AND BOUNDARY CONDITIONS

BACKPLATE

SE CONE

SC ARRAY

Rear of the SE

SE coneinsulation

•back plate set at 18.05C; •rear of SE set at 18.02C;•SE cone/SE fixation 18.5C•adiabatic conditions -outer part of the model•steady state analysis for gas temperature 18C (first run) and 20C(second run)

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 4

……SC array

… Back p late

…SE cone

… SE cone insulation

… air

… Nitrogen

…SE insulation

… IES

THE MODEL - DETAILS OF THE MESH

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 5

THE RESULTS OF THE ANALYSIS

1st case: no insulation of SE cone 2nd case: insulation 20mm of SE coneTmax DT/t* DT/l** Tmax DT/t DT/l

SC close central hole -Nitrogen temp. 18oC 18.12oC 0.07 o 18.11 oC 0.06 o

-Nitrogen temp. 20oC 18.16 oC0.04 o

0.11 o 18.12 oC0.01 o

0.07 o

SC in centrum of array -Nitrogen temp. 18oC 18.1 oC 0.05 o 18.1 oC 0.05 o

-Nitrogen temp. 20oC 18.1 oC0 o

0.05 o 18.1 oC0 o

0.05 o

SC in outer part of array -Nitrogen temp. 18oC 18.07 oC 0.02 o 18.07 oC 0.02 o

-Nitrogen temp. 20oC 18.07 oC0 o

0.02 o 18.07 oC0 o

0.02 o

DT/r*** -Nitrogen temp. 18oC 0.07 o 0.06 o

-Nitrogen temp. 20oC 0.11 o 0.07 o

*DT/t- temperature variation over time (should be less than +/-0.1 degree) **DT/l - temperature variation over length of the Supercrystal (should be less than 2 degrees) ***DT/r - temperature variation in r direction of Supercrystal array.

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 6

THE RESULTS OF THE ANALYSIS FOR 1st CASE (NO INSULATION)

Temperature maps of the SC situated close to the central hole for nitrogen temperature 18°C (on the left) and 20°C (on the right)

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 7

Temperature maps of the SC situated in centrum of SC array for nitrogen temperature 18°C (on the left) and 20°C (on the right)

THE RESULTS OF THE ANALYSIS FOR 1st CASE (NO INSULATION)

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 8

Temperature maps of the SC situated in outer part of SC array for nitrogen temperature 18°C (on the left) and 20°C (on the right)

THE RESULTS OF THE ANALYSIS FOR 1st CASE (NO INSULATION)

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 9

THE RESULTS OF THE ANALYSIS FOR 2nd CASE (WITH INSULATION)

Temperature maps of the SC situated close to central hole for nitrogen temperature 18°C (on the left) and 20°C (on the right)

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 10

THE RESULTS OF THE ANALYSIS FOR 2nd CASE (WITH INSULATION)

Temperature maps of the SC situated in centrum of SC array for nitrogen temperature 18°C (on the left) and 20°C (on the right)

EE workshop 13th March 2002

Izabella Wichrowska-Polok ST/CV 11

THE RESULTS OF THE ANALYSIS FOR 2nd CASE (WITH INSULATION)

Temperature maps of the SC situated in outer part of SC array for nitrogen temperature 18°C (on the left) and 20°C (on the right)