/data/refman/pasoursint/CMSSW_4_4_5_patch3/src/SimMuon/CSCDigitizer/src/CSCStripAmpResponse.cc

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#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "SimMuon/CSCDigitizer/src/CSCStripAmpResponse.h"

#include <iostream>
#include <cmath>


CSCStripAmpResponse::CSCStripAmpResponse(int shapingTime, int tailShaping)
: theShapingTime(shapingTime),
  theTailShaping(tailShaping)
{
}


float CSCStripAmpResponse::calculateAmpResponse(float t) const
{

    // Local variables 
    double t1, t3, t5, t7, cat=0.;

// ! CSC Cathode amplifier-shaper response to single e- 

//     Author: S. Durkin Oct. 13, 1995 

//     Routine gives cathode amplifier response to a single drift electron 
//     Positive ion drift collection is included 
//     FLAGS:      itp  amplifier/shaper peaking time 
//     10,20,30,40,50,60,70,80,90,100,150,200,250,300 nsec available 
//                 itl  amplifier tail cancellation 
//                      1 no tail cancellation 
//                      2 conservative tail cancellation 
//                      3 radical tail cancellation(some charge loss) 

//     calculations were done using maple 
//     4-pole semigaussian shaper is assumed 

//     frequency 2tp/27/exp(-3)/(stp/3+1)**3 
//                           | 
//                           \/ 
//     time     (t/tp)**3/exp(-3)*exp(-3t/tp) 

//     this time distribution was convoluted with positive ion 
//     drift formula 

//                1/(t0+t)*.05650     note:normalization estimated from K1 
//                                         Gatti N.I.M. 163,82(1979) 
//                where t0=2.1 nsec (GEM gas) 

//            standard tail cancellation has lowest pole removed (exp approx) 
//            using 1 zero and 1 pole 
//            radical tail cancellation has lowest two poles removed (exp approx) 
//            using 2 zeros and 2 poles 

    if(theTailShaping != 0 && theTailShaping != 1 && theTailShaping != 2) {
       edm::LogError("CSCStripElectronicsSim") << "Bad TailShaping CSCStripElectronicsSim"
            << theTailShaping;
        return 0.;
    }

    switch(theShapingTime) {
/*
    case 10:
// no tail cancellation, tp= 10,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.3);
            cat = exp(t * -.06523809524) * .2100138871 + exp(t * 
                    -.400952381) * 23.38590029 + exp(t * -.01333333333) * 
                    .02085199407 + exp(t * -.002285714286) * .004416201989 + 
                    t5 * .00345590637 * t * t7 - t5 * .1260070972 * t7 + t *
                     2.304266717 * t7 - t7 * 23.62118237;
        }
//  tail cancellation, tp= 10,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.3);
            cat = t1 * .003469104089 * t * t3 - t1 * .1263548058 * t3 + t * 
                    2.310721678 * t3 - t3 * 23.68962448 + exp(t * 
                    -.01333333333) * .02323396152 + exp(t * -.400952381) * 
                    23.45252892 + exp(t * -.06523809524) * .2138615931 + exp(
                    t * -.003418326524) * 1.274497241e-11;
        }
//  radical tail cancellation, tp= 10,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.3);
            cat = t1 * .003561830965 * t * t3 - t1 * .1287358512 * t3 + t * 
                    2.355429782 * t3 - t3 * 24.16270544 - exp(t * 
                    -.0207962661) * 1.717680715e-10 + exp(t * -.003418326524)
                     * 7.271661158e-12 + exp(t * -.400952381) * 23.91293094 
                    + exp(t * -.06523809524) * .2497744869;
        }
        break; 
    case 20:
// no tail cancellation, tp= 20,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.15);
            cat = exp(t * -.06523809524) * 1.544776642 + exp(t * 
                    -.400952381) * .07655350666 + exp(t * -.01333333333) * 
                    .0504563677 + exp(t * -.002285714286) * .009108935882 + 
                    t5 * 1.849663895e-5 * t * t7 - t5 * .008530427568 * t7 - 
                    t * .1199681494 * t7 - t7 * 1.680895453;
        }
//  tail cancellation, tp= 20,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.15);
            cat = t1 * 1.863955948e-5 * t * t3 - t1 * .008593415697 * t3 -
                    t * .1217545504 * t3 - t3 * 1.706070522 + exp(t * 
                    -.01333333333) * .05622010555 + exp(t * -.400952381) * 
                    .07677161489 + exp(t * -.06523809524) * 1.573078801 + 
                    exp(t * -.003418326524) * 2.669976603e-11;
        }
//  radical tail cancellation, tp= 20,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.15);
            cat = t1 * 1.971619848e-5 * t * t3 - t1 * .009064781071 * t3 -
                    t * .1360836779 * t3 - t3 * 1.915518161 - exp(t * 
                    -.0207962661) * 4.682061154e-10 + exp(t * -.003418326524)
                     * 1.523358744e-11 + exp(t * -.400952381) * .07827873625 
                    + exp(t * -.06523809524) * 1.837239425;
        }
        break; 
*/
    case 30:
// no tail cancellation, tp= 30,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.1);
            cat = exp(t * -.06523809524) * 16.18007335 + exp(t * 
                    -.400952381) * .01096643477 + exp(t * -.01333333333) * 
                    .0924451733 + exp(t * -.002285714286) * .01409456303 - 
                    t5 * 7.567748611e-5 * t * t7 - t5 * .01068701841 * t7 - 
                    t * .5685389492 * t7 - t7 * 16.29757952;
        }
//  tail cancellation, tp= 30,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.1);
            cat = t1 * -7.656495508e-5 * t * t3 - t1 * .01083991133 * t3 - 
                    t * .5783722846 * t3 - t3 * 16.59051472 + exp(t * 
                    -.01333333333) * .1030053814 + exp(t * -.400952381) * 
                    .01099767919 + exp(t * -.06523809524) * 16.47651166 + 
                    exp(t * -.003418326524) * 4.197333487e-11;
        }
//  radical tail cancellation, tp= 30,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.1);
            cat = t1 * -8.37792502e-5 * t * t3 - t1 * .0121345525 * t3 - t *
                     .6655605456 * t3 - t3 * 19.25455777 - exp(t * 
                    -.0207962661) * 9.823832281e-10 + exp(t * -.003418326524)
                     * 2.394794269e-11 + exp(t * -.400952381) * .01121357717 
                    + exp(t * -.06523809524) * 19.2433442;
        }
        break; 
/*
    case 40:
// no tail cancellation, tp= 40,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.075);
            cat = exp(t * -.06523809524) * 1097.590331 + exp(t * 
                    -.400952381) * .003362201622 + exp(t * -.01333333333) * 
                    .1521508944 + exp(t * -.002285714286) * .01939048554 - 
                    t5 * 1.579570388e-4 * t * t7 - t5 * .05281648589 * t7 -
                    t * 10.72426897 * t7 - t7 * 1097.765235;
        }
//  tail cancellation, tp= 40,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.075);
            cat = t1 * -1.604563386e-4 * t * t3 - t1 * .05375692904 * t3 -
                    t * 10.92023147 * t3 - t3 * 1117.872403 + exp(t * 
                    -.01333333333) * .1695314135 + exp(t * -.400952381) * 
                    .003371780853 + exp(t * -.06523809524) * 1117.6995 + exp(
                    t * -.003418326524) * 5.868522605e-11;
        }
//  radical tail cancellation, tp= 40,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.075);
            cat = t1 * -1.825484488e-4 * t * t3 - t1 * .06238107065 * t3 -
                    t * 12.7419738 * t3 - t3 * 1305.393597 - exp(t * 
                    -.0207962661) * 1.889428819e-9 + exp(t * -.003418326524) 
                    * 3.348293469e-11 + exp(t * -.400952381) * .003437973064 
                    + exp(t * -.06523809524) * 1305.390159;
        }
        break; 
    case 50:
// no tail cancellation, tp= 50,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.06);
            cat = exp(t * -.06523809524) * 6778.833027 + exp(t * 
                    -.400952381) * .001437922352 + exp(t * -.01333333333) * 
                    .237530423 + exp(t * -.002285714286) * .02501521924 + t5 
                    * 1.670506271e-4 * t * t7 - t5 * .09338148045 * t7 + t *
                     35.49613478 * t7 - t7 * 6779.097011;
        }
//  tail cancellation, tp= 50,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.06);
            cat = t1 * 1.703945294e-4 * t * t3 - t1 * .09507342939 * t3 + t 
                    * 36.14686596 * t3 - t3 * 6903.29548 + exp(t * 
                    -.01333333333) * .2646640264 + exp(t * -.400952381) * 
                    .001442019131 + exp(t * -.06523809524) * 6903.029373 + 
                    exp(t * -.003418326524) * 7.696672009e-11;
        }
//  radical tail cancellation, tp= 50,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.06);
            cat = t1 * 2.028313098e-4 * t * t3 - t1 * .1106897038 * t3 + t *
                     42.23121193 * t3 - t3 * 8062.228042 - exp(t * 
                    -.0207962661) * 3.535147864e-9 + exp(t * -.003418326524) 
                    * 4.391346571e-11 + exp(t * -.400952381) * .001470327741 
                    + exp(t * -.06523809524) * 8062.226572;
        }
        break; 
    case 60:
// no tail cancellation, tp= 60,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.05);
            cat = exp(t * -.06523809524) * 54.77495457 + exp(t * 
                    -.400952381) * 7.412655802e-4 + exp(t * -.01333333333) * 
                    .3606757184 + exp(t * -.002285714286) * .03098847247 + 
                    t5 * 3.411745868e-5 * t * t7 - t5 * .006682738979 * t7 + 
                    t * .8202227541 * t7 - t7 * 55.16736002;
        }
//  tail cancellation, tp= 60,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.05);
            cat = t1 * 3.494700919e-5 * t * t3 - t1 * .006791801191 * t3 +
                    t * .8354834745 * t3 - t3 * 56.18111721 + exp(t * 
                    -.01333333333) * .40187647 + exp(t * -.400952381) * 
                    7.433775162e-4 + exp(t * -.06523809524) * 55.77849736 + 
                    exp(t * -.003418326524) * 9.696210758e-11;
        }
//  radical tail cancellation, tp= 60,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.05);
            cat = t1 * 4.387761992e-5 * t * t3 - t1 * .007610015855 * t3 +
                    t * .9929540112 * t3 - t3 * 65.14590792 - exp(t * 
                    -.0207962661) * 6.643853476e-9 + exp(t * -.003418326524) 
                    * 5.532186095e-11 + exp(t * -.400952381) * 7.57970932e-4 
                    + exp(t * -.06523809524) * 65.14514995;
        }
        break; 
    case 70:
// no tail cancellation, tp= 70,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.04285714286);
            cat = exp(t * -.06523809524) * 7.412251365 + exp(t * 
                    -.400952381) * 4.306575393e-4 + exp(t * -.01333333333) * 
                    .5403469187 + exp(t * -.002285714286) * .03733123063 + 
                    t5 * 1.441232259e-5 * t * t7 - t5 * .002150258989 * t7 + 
                    t * .1485797804 * t7 - t7 * 7.990360172;
        }
//  tail cancellation, tp= 70,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.04285714286);
            cat = t1 * 1.48262187e-5 * t * t3 - t1 * .002180526664 * t3 + t 
                    * .1513118077 * t3 - t3 * 8.150556465 + exp(t * 
                    -.01333333333) * .6020718923 + exp(t * -.400952381) * 
                    4.318845237e-4 + exp(t * -.06523809524) * 7.548052688 + 
                    exp(t * -.003418326524) * 1.188301202e-10;
        }
//  radical tail cancellation, tp= 70,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.04285714286);
            cat = t1 * 1.984175252e-5 * t * t3 - t1 * .00223612384 * t3 + t 
                    * .1974584549 * t3 - t3 * 8.816006345 - exp(t * 
                    -.0207962661) * 1.284819542e-8 + exp(t * -.003418326524) 
                    * 6.779868504e-11 + exp(t * -.400952381) * 4.40362949e-4 
                    + exp(t * -.06523809524) * 8.815565996;
        }
        break; 
    case 80:
// no tail cancellation, tp= 80,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.0375);
            cat = exp(t * -.06523809524) * 2.104660307 + exp(t * 
                    -.400952381) * 2.718693973e-4 + exp(t * -.01333333333) * 
                    .806342238 + exp(t * -.002285714286) * .04406584799 + t5 
                    * 7.444156851e-6 * t * t7 - t5 * .00109040647 * t7 + t *
                     .03743972817 * t7 - t7 * 2.955340262;
        }
//  tail cancellation, tp= 80,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.0375);
            cat = t1 * 7.69154327e-6 * t * t3 - t1 * .001104867276 * t3 + t 
                    * .0378353391 * t3 - t3 * 3.041945271 + exp(t * 
                    -.01333333333) * .8984524213 + exp(t * -.400952381) * 
                    2.726439789e-4 + exp(t * -.06523809524) * 2.143220205 + 
                    exp(t * -.003418326524) * 1.42745537e-10;
        }
//  radical tail cancellation, tp= 80,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.0375);
            cat = t1 * 1.112798871e-5 * t * t3 - t1 * 9.813148933e-4 * t3 +
                    t * .06953288418 * t3 - t3 * 2.503400292 - exp(t * 
                    -.0207962661) * 2.618804719e-8 + exp(t * -.003418326524) 
                    * 8.144365827e-11 + exp(t * -.400952381) * 
                    2.779963161e-4 + exp(t * -.06523809524) * 2.50312232;
        }
        break;
    case 90:
// no tail cancellation, tp= 90,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.03333333333);
            cat = exp(t * -.06523809524) * .8445180788 + exp(t * 
                    -.400952381) * 1.824319111e-4 + exp(t * -.01333333333) * 
                    1.207282396 + exp(t * -.002285714286) * .051216146 + t5 *
                     4.216536082e-6 * t * t7 - t5 * 7.082920848e-4 * t7 + t 
                    * .001275426356 * t7 - t7 * 2.103199053;
        }
//  tail cancellation, tp= 90,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.03333333333);
            cat = t1 * 4.376178381e-6 * t * t3 - t1 * 7.190991486e-4 * t3 +
                    t * 6.011974229e-4 * t3 - t3 * 2.205366435 + exp(t * 
                    -.01333333333) * 1.345192821 + exp(t * -.400952381) * 
                    1.829516768e-4 + exp(t * -.06523809524) * .8599906622 + 
                    exp(t * -.003418326524) * 1.68900989e-10;
        }
//  radical tail cancellation, tp= 90,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.03333333333);
            cat = t1 * 6.981183555e-6 * t * t3 - t1 * 5.238041184e-4 * t3 +
                    t * .03211389084 * t3 - t3 * 1.004591827 - exp(t * 
                    -.0207962661) * 5.795834545e-8 + exp(t * -.003418326524) 
                    * 9.636668658e-11 + exp(t * -.400952381) * 
                    1.865432436e-4 + exp(t * -.06523809524) * 1.004405341;
        }
        break; 
*/
    case 100:
// no tail cancellation, tp=100,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.03);
            cat = exp(t * -.06523809524) * .4137221868 + exp(t * 
                    -.400952381) * 1.282766787e-4 + exp(t * -.01333333333) * 
                    1.824993745 + exp(t * -.002285714286) * .05880752038 + 
                    t5 * 2.491640871e-6 * t * t7 - t5 * 5.417458918e-4 * t7 
                    - t * .01742000448 * t7 - t7 * 2.297651729;
        }
//  tail cancellation, tp=100,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.03);
            cat = t1 * 2.597806608e-6 * t * t3 - t1 * 5.528471798e-4 * t3 -
                    t * .0189975081 * t3 - t3 * 2.454897362 + exp(t * 
                    -.01333333333) * 2.033466647 + exp(t * -.400952381) * 
                    1.28642151e-4 + exp(t * -.06523809524) * .4213020729 + 
                    exp(t * -.003418326524) * 1.975089906e-10;
        }
//  radical tail cancellation, tp=100,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.03);
            cat = t1 * 4.704262123e-6 * t * t3 - t1 * 3.14519427e-4 * t3 +
                    t * .01738754854 * t3 - t3 * .4921806115 - exp(t * 
                    -.0207962661) * 1.454692205e-7 + exp(t * -.003418326524) 
                    * 1.126890204e-10 + exp(t * -.400952381) * 
                    1.311675549e-4 + exp(t * -.06523809524) * .4920495894;
        }
        break; 
/*
    case 150:
// no tail cancellation, tp=150,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.02);
            cat = exp(t * -.06523809524) * .0451302243 + exp(t * 
                    -.400952381) * 3.417148182e-5 + exp(t * -.01333333333) * 
                    21.12261275 + exp(t * -.002285714286) * .1043948969 - t5 
                    * 1.285903907e-7 * t * t7 - t5 * 5.344294733e-4 * t7 -
                    t * .1406120762 * t7 - t7 * 21.27217204;
        }
//  tail cancellation, tp=150,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.02);
            cat = t1 * -1.373737668e-7 * t * t3 - t1 * 5.725228237e-4 * t3 - 
                    t * .1548112258 * t3 - t3 * 23.58148492 + exp(t * 
                    -.01333333333) * 23.5354936 + exp(t * -.400952381) * 
                    3.426883961e-5 + exp(t * -.06523809524) * .04595706409 + 
                    exp(t * -.003418326524) * 3.864816979e-10;
        }
//  radical tail cancellation, tp=150,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.02);
            cat = t1 * 1.150149576e-6 * t * t3 - t1 * 5.745717877e-5 * t3 +
                    t * .00244082808 * t3 - t3 * .05294004164 - exp(t * 
                    -.0207962661) * 7.693441476e-4 + exp(t * -.003418326524) 
                    * 2.205076529e-10 + exp(t * -.400952381) * 
                    3.494157914e-5 + exp(t * -.06523809524) * .05367444399;
        }
        break; 
    case 200:
// no tail cancellation, tp=200,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.015);
            cat = exp(t * -.06523809524) * .01251802645 + exp(t * 
                    -.400952381) * 1.36834457e-5 + exp(t * -.01333333333) * 
                    2281.242177 + exp(t * -.002285714286) * .1659547829 - t5 
                    * 1.421417147e-6 * t * t7 - t5 * .003198621512 * t7 - t 
                    * 3.803546128 * t7 - t7 * 2281.420663;
        }
//  tail cancellation, tp=200,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.015);
            cat = t1 * -1.560422488e-6 * t * t3 - t1 * .003547432409 * t3 -
                    t * 4.235743145 * t3 - t3 * 2541.846068 + exp(t * 
                    -.01333333333) * 2541.833308 + exp(t * -.400952381) * 
                    1.372243114e-5 + exp(t * -.06523809524) * .01274737169 + 
                    exp(t * -.003418326524) * 6.850793727e-10;
        }
//  radical tail cancellation, tp=200,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.015);
            cat = t1 * 4.486861205e-7 * t * t3 - t1 * 1.982974483e-5 * t3 +
                    t * 7.533435174e-4 * t3 - t3 * .01490186176 - exp(t * 
                    -.0207962661) * 1.155963393e-7 + exp(t * -.003418326524) 
                    * 3.908729581e-10 + exp(t * -.400952381) * 
                    1.399181936e-5 + exp(t * -.06523809524) * .01488798515;
        }
        break;
    case 250:
// no tail cancellation, tp=250,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t;
            t7 = exp(t * -.012);
            cat = exp(t * -.06523809524) * .005082161364 + exp(t * 
                    -.400952381) * 6.792264583e-6 + exp(t * -.01333333333) * 
                    2851.552722 + exp(t * -.002285714286) * .2493354963 + t5 
                    * 1.282866561e-6 * t * t7 - t5 * .002554194047 * t7 + t 
                    * 3.799921386 * t7 - t7 * 2851.807146;
        }
//  tail cancellation, tp=250,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.012);
            cat = t1 * 1.452179735e-6 * t * t3 - t1 * .0028321086 * t3 + t *
                     4.236667018 * t3 - t3 * 3177.296817 + exp(t * 
                    -.01333333333) * 3177.291635 + exp(t * -.400952381) * 
                    6.811616389e-6 + exp(t * -.06523809524) * .005175272648 
                    + exp(t * -.003418326524) * 1.163611956e-9;
        }
//  radical tail cancellation, tp=250,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.012);
            cat = t1 * 2.201206315e-7 * t * t3 - t1 * 9.091071906e-6 * t3 +
                    t * 3.244901734e-4 * t3 - t3 * .006051269645 - exp(t * 
                    -.0207962661) * 1.115870681e-8 + exp(t * -.003418326524) 
                    * 6.639003673e-10 + exp(t * -.400952381) * 
                    6.945336809e-6 + exp(t * -.06523809524) * .006044334803;
        }
        break; 
    case 300:
// no tail cancellation, tp=300,t0=2.1 
        if (theTailShaping == NONE) {
// Computing 2nd power 
            t5 = t * t ;
            t7 = exp(t * -.01);
            cat = exp(t * -.06523809524) * .002537698188 + exp(t * 
                    -.400952381) * 3.850890276e-6 + exp(t * -.01333333333) * 
                    42.24522552 + exp(t * -.002285714286) * .3628281578 + t5 
                    * 3.42649397e-7 * t * t7 - t5 * 2.496575507e-4 * t7 + t 
                    * .1381601414 * t7 - t7 * 42.61059522;
        }
//  tail cancellation, tp=300,t0=2.1 
        if (theTailShaping == CONSERVATIVE) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.01);
            cat = t1 * 4.016144767e-7 * t * t3 - t1 * 2.657431191e-4 * t3 +
                    t * .1570475462 * t3 - t3 * 47.07357524 + exp(t * 
                    -.01333333333) * 47.07098718 + exp(t * -.400952381) * 
                    3.861861828e-6 + exp(t * -.06523809524) * .002584191857 
                    + exp(t * -.003418326524) * 1.946287754e-9;
        }
//  radical tail cancellation, tp=300,t0=2.1 
        if (theTailShaping == RADICAL) {
// Computing 2nd power 
            t1 = t * t;
            t3 = exp(t * -.01);
            cat = t1 * 1.239979555e-7 * t * t3 - t1 * 4.905476843e-6 * t3 +
                    t * 1.682559598e-4 * t3 - t3 * .00302208046 - exp(t * 
                    -.0207962661) * 2.845569802e-9 + exp(t * -.003418326524) 
                    * 1.110457097e-9 + exp(t * -.400952381) * 3.937674932e-6 
                    + exp(t * -.06523809524) * .00301814452;
        }
        break;
*/
    default:
        edm::LogError("CSCStripElectronicsSim") << "Bad shaping time CSCStripElectronicsSim " 
             << theShapingTime;
        break;
    }
    return cat;
}